In this task, you are given a context, a subject, a relation, and many options. Based on the context, from the options select the object entity that has the given relation with the subject. Answer with text (not indexes).

Input: Consider Input: Context: Time travel is the concept of movement (such as by a human) between certain points in time, analogous to movement between different points in space, typically using a hypothetical device known as a time machine, in the form of a vehicle or of a portal connecting distant points in time. Time travel is a recognized concept in philosophy and fiction, but traveling to an arbitrary point in time has a very limited support in theoretical physics, and usually only in conjunction with quantum mechanics or wormholes, also known as Einstein-Rosen bridges. In a more narrow sense, one-way time travel into the future via time dilation is a well-understood phenomenon within the frameworks of special relativity and general relativity, but advancing a large amount of time is not feasible with current technology. The concept was touched upon in various earlier works of fiction, but was popularized by H. G. Wells' 1895 novel "The Time Machine", which moved the concept of time travel into the public imagination, and it remains a popular subject in science fiction., The Eighth Doctor Adventures (sometimes abbreviated as EDA or referred to as the EDAs) are a series of spin off novels based on the long running BBC science fiction television series "Doctor Who" and published under the BBC Books imprint. 73 books were published overall., Unnatural History is an original novel written by Jonathan Blum and Kate Orman and based on the long - running British science fiction television series Doctor Who . It features the Eighth Doctor , Sam , Fitz and Faction Paradox ., Doctor Who is a British science-fiction television programme produced by the BBC since 1963. The programme depicts the adventures of a Time Lord called "The Doctor", an extraterrestrial being from the planet Gallifrey. He explores the universe in a time-travelling space ship called the TARDIS. Its exterior appears as a blue British police box, which was a common sight in Britain in 1963 when the series first aired. Accompanied by a number of companions, the Doctor combats a variety of foes, while working to save civilisations and help people in need., The British Broadcasting Corporation (BBC) is a British public service broadcaster. It is headquartered at Broadcasting House in London, is the world's oldest national broadcasting organisation, and is the largest broadcaster in the world by number of employees, with over 20,950 staff in total, of whom 16,672 are in public sector broadcasting; including part-time, flexible as well as fixed contract staff, the total number is 35,402., Faction Paradox is a fictional time travelling cult/rebel group/organized crime syndicate, originally created by the author Lawrence Miles. The Faction's belief-system as portrayed has some similarities to voodoo, and is sometimes described as such. The family/organization were originally featured as recurring antagonists in the BBC "Doctor Who" Eighth Doctor Adventures novels, but have since featured in their own continuing tales. , Lawrence Miles (born 15 March 1972 in Middlesex) is a science fiction author known for his work on original "Doctor Who" novels (for both the Virgin New Adventures and BBC Books series) and the subsequent spin-off Faction Paradox. He is also co-author (with Tat Wood) of the "About Time" series of "Doctor Who" critiques., A police box, used in the United Kingdom throughout the 20th century, is a public telephone kiosk or callbox for the use of members of the police, or for members of the public to contact the police. Unlike an ordinary callbox, its telephone was located behind a hinged door so it could be used from the outside, and the interior of the box was, in effect, a miniature police station for use by police officers to read and fill in reports, take meal breaks and even temporarily hold prisoners until the arrival of transport., Subject: unnatural history , Relation: publisher, Options: (A) bbc (B) bbc books (C) box (D) century (E) portal

Output: bbc books


Input: Consider Input: Context: The British Broadcasting Corporation (BBC) is a British public service broadcaster. It is headquartered at Broadcasting House in London, is the world's oldest national broadcasting organisation, and is the largest broadcaster in the world by number of employees, with over 20,950 staff in total, of whom 16,672 are in public sector broadcasting; including part-time, flexible as well as fixed contract staff, the total number is 35,402., Doctor Who is a British science-fiction television programme produced by the BBC since 1963. The programme depicts the adventures of a Time Lord called "The Doctor", an extraterrestrial being from the planet Gallifrey. He explores the universe in a time-travelling space ship called the TARDIS. Its exterior appears as a blue British police box, which was a common sight in Britain in 1963 when the series first aired. Accompanied by a number of companions, the Doctor combats a variety of foes, while working to save civilisations and help people in need., A Very Peculiar Practice is a BBC comedy-drama series, which ran for two series in 1986 and 1988. The series was a surreal black comedy, set in the health centre of a British university. The two series were followed by a 90-minute made-for-television film following some of the characters to a new setting in Poland., A police box, used in the United Kingdom throughout the 20th century, is a public telephone kiosk or callbox for the use of members of the police, or for members of the public to contact the police. Unlike an ordinary callbox, its telephone was located behind a hinged door so it could be used from the outside, and the interior of the box was, in effect, a miniature police station for use by police officers to read and fill in reports, take meal breaks and even temporarily hold prisoners until the arrival of transport., A television program is a segment of content intended for broadcast on over-the-air, cable television, or Internet television, other than a commercial, trailer, or any other segment of content not serving as attraction for viewership. It may be a single production, or more commonly, a series of related productions (also called a television series or a television show)., Hampstead (or ), commonly known as Hampstead Village, is an area of London, England, northwest of Charing Cross. Part of the London Borough of Camden, it is known for its intellectual, liberal, artistic, musical and literary associations and for Hampstead Heath, a large, hilly expanse of parkland. It has some of the most expensive housing in the London area. The village of Hampstead has more millionaires within its boundaries than any other area of the United Kingdom., David Troughton (born 9 June 1950, Hampstead, London) is an English actor, known for his Shakespearean roles on the British stage and for his many roles on British television, including Dr Bob Buzzard in "A Very Peculiar Practice" and Ricky Hansen in "New Tricks"., The TARDIS (Time And Relative Dimension In Space) is a fictional time machine and spacecraft that appears in the British science fiction television programme "Doctor Who" and its various spin-offs., Michael Troughton ( born 2 March 1955 ) is an English actor , writer , and teacher . He is the son of actor Patrick Troughton ( known as the Second Doctor in Doctor Who in the 1960s ) and the younger brother of David Troughton ., New Tricks is a British procedural comedy-drama that follows the work of the fictional Unsolved Crime and Open Case Squad (UCOS) of the Metropolitan Police Service. Originally led by Detective Superintendent Sandra Pullman, it is made up of retired police officers recruited to reinvestigate unsolved crimes. There have been cast changes, but the squad always consists of three men with a female boss. The series title is taken from the proverb "You can't teach an old dog new tricks". In February 2015, BBC One announced the show would end after series 12, which comprises 10 episodes., The Second Doctor is an incarnation of the Doctor, the protagonist of the BBC science fiction television series "Doctor Who". He was portrayed by character actor Patrick Troughton., The Time Lords are a fictional, ancient extraterrestrial people in the British science fiction television series "Doctor Who", of which the series' protagonist, the Doctor, is a member. Time Lords are so named for their command of time travel technology and their non-linear perception of time. Originally they were described as a powerful and wise race from the planet Gallifrey, from which the Doctor was a renegade; details beyond this were very limited for the first decade of the series. They later became integral to many episodes and stories as their role in the fictional universe developed. For the first eight years after the series resumed in 2005, the Time Lords were said to have been destroyed at some point between the original series' cancellation in 1989 and the show's revival during the fictional Last Great Time War. In 2013, the 50th anniversary special "The Day of the Doctor" concerned this supposed destruction and their eventual survival., Gallifrey (or ) is a planet in the long-running British science fiction television series "Doctor Who". It is the original home world of the Doctor, The Master, and The Rani, as well as other Time Lords that have been seen in the show. It was located in a binary star system within the constellation of Kasterborous, at "galactic coordinates ten-zero-eleven-zero-zero by zero-two from galactic zero centre"., Patrick George Troughton (25 March 1920  28 March 1987) was an English actor. He was classically trained for the stage but became most widely known for his roles in television and film. His work included appearances in several fantasy, science fiction and horror films, but he became best known for his role as the second incarnation of the Doctor in the long-running British science-fiction television series "Doctor Who", which he played from 1966 to 1969; he reprised the role in 1973, 1983 and 1985., A character actor or character actress is a supporting actor who plays unusual, interesting, or eccentric characters. The term, often contrasted with that of leading actor, is somewhat abstract and open to interpretation. In a literal sense, all actors can be considered character actors since they all play "characters", but in the usual sense it is an actor who plays a distinctive and important supporting role. , Subject: michael troughton, Relation: place_of_birth, Options: (A) box (B) camden (C) drama (D) gallifrey (E) george (F) hampstead (G) hampstead heath (H) home (I) london (J) london borough (K) london borough of camden (L) made (M) march (N) of (O) pullman (P) time (Q) united kingdom (R) wise

Output: hampstead


Input: Consider Input: Context: A light meter is a device used to measure the amount of light. In photography, a light meter is often used to determine the proper exposure for a photograph. Typically a light meter will include either digital or analog electronic circuit, which allows the photographer to determine which shutter speed and f-number should be selected for an optimum exposure, given a certain lighting situation and film speed., In optics, an aperture is a hole or an opening through which light travels. More specifically, the aperture and focal length of an optical system determine the cone angle of a bundle of rays that come to a focus in the image plane. The aperture determines how collimated the admitted rays are, which is of great importance for the appearance at the image plane. If an aperture is narrow, then highly collimated rays are admitted, resulting in a sharp focus at the image plane. A wide aperture admits uncollimated rays, resulting in a sharp focus only for rays coming from a certain distance. This means that a wide aperture results in an image that is sharp for things at the correct distance. The aperture also determines how many of the incoming rays are actually admitted and thus how much light reaches the image plane (the narrower the aperture, the darker the image for a given exposure time). In the human eye, the pupil is the aperture., Aperture priority, often abbreviated A or Av (for aperture value) on a camera mode dial, is a setting on some cameras that allows the user to set a specific aperture value (f-number) while the camera selects a shutter speed to match it that will result in proper exposure based on the lighting conditions as measured by the camera's light meter. This is different from manual mode, where the user must decide both values, shutter priority where the user picks a shutter speed with the camera selecting an appropriate aperture, or program mode where the camera selects both., A lens mount is an interface  mechanical and often also electrical  between a photographic camera body and a lens. It is confined to cameras where the body allows interchangeable lenses, most usually the rangefinder camera, single lens reflex type or any movie camera of 16 mm or higher gauge. Lens mounts are also used to connect optical components in instrumentation that may not involve a camera, such as the modular components used in optical laboratory prototyping which join via C-mount or T-mount elements., A mode dial or camera dial is a dial used on digital cameras to change the camera's mode. Most digital cameras, including dSLR and SLR-like cameras, support modes, selectable either by a dial or from a menu. On point-and-shoot cameras which support modes a range of scene types is offered. On dSLR cameras and SLR-like cameras, mode dials usually offer access to manual settings. The more compact point-and-shoot cameras, and cameras offering a great many modes, do not have mode dials, using menus instead. Some SLR lenses themselves offer control over things such as aperture, reducing the need for mode support in the camera body., The Canon AV - 1 is a 35mm single - lens reflex camera with an FD lens mount , introduced by Canon Inc. in 1979 . The AV - 1 was very similar to the 1976 AE - 1 but provided aperture priority autoexposure rather than the AE - 1 's shutter speed priority AE . The camera is not capable of fully manual exposure . Canon 's international distributors , particularly in the United States , had clamored for such a camera because competing brands offered mostly aperture - priority cameras and some preferred it . The AV in the name referred to the type of autoexposure ; Av ( Aperture Value ) is a common abbreviation for aperture priority . When this camera appeared , a new range of FD lenses was introduced , featuring instant mounting / unmounting of the lens . This was called the New FD mount and did away with the older type of mounting ring which was fitted on to the rear of the lens and was awkward to use and needed two hands , to a newer , easier system whereby the user lined up the red dot on the lens , with the red dot on the camera and simply turned the whole lens clockwise until it clicked into place . All the other AE - 1 accessories fit the AV - 1 ., In photography, shutter speed or exposure time is the length of time when the film or digital sensor inside the camera is exposed to light, also when a camera's shutter is open when taking a photograph.
The amount of light that reaches the film or image sensor is proportional to the exposure time. 1/500th of a second will let half as much light in as 1/250th., A rangefinder camera is a camera fitted with a rangefinder, typically a split-image rangefinder: a range-finding focusing mechanism allowing the photographer to measure the subject distance and take photographs that are in sharp focus. Most varieties of rangefinder show two images of the same subject, one of which moves when a calibrated wheel is turned; when the two images coincide and fuse into one, the distance can be read off the wheel. Older, non-coupled rangefinder cameras display the focusing distance and require the photographer to transfer the value to the lens focus ring; cameras without built-in rangefinders could have an external rangefinder fitted into the accessory shoe. Earlier cameras of this type had separate viewfinder and rangefinder windows; later the rangefinder was incorporated into the viewfinder. More modern designs have rangefinders coupled to the focusing mechanism, so that the lens is focused correctly when the rangefinder images fuse; compare with the focusing screen in non-autofocus SLRs., Shutter priority refers to a setting on some cameras that allows the user to choose a specific shutter speed while the camera adjusts the aperture to ensure correct exposure. This is different from manual mode, where the user must decide both values, aperture priority where the user picks an aperture with the camera selecting the shutter speed to match, or program mode where the camera selects both., , commonly known as TOPIX, along with the Nikkei 225, is an important stock market index for the Tokyo Stock Exchange (TSE) in Japan, tracking all domestic companies of the exchange's First Section. It is calculated and published by the TSE. , there are 1,669 companies listed on the First Section of the TSE, and the market value for the index was ¥197.4 trillion., The T-mount is a standard lens mount for cameras and other optical assemblies. The usual T-mount is a screw mount using a male 42×0.75 (42 mm diameter, 0.75 mm thread pitch) metric thread on the lens with a flange focal distance of 55 mm and a mating female 42mm thread on a camera adapter or other optical component. This thread form is referred to as T-thread. (This should not be confused with the M42 lens mount which is also 42 mm diameter, but has a 1 mm thread pitch.), The , which is called or TSE for short, is a stock exchange located in Tokyo, Japan. It is the fourth largest stock exchange in the world by aggregate market capitalization of its listed companies, and largest in East Asia and Asia. It had 2,292 listed companies with a combined market capitalization of US$4.09 trillion as of April 2015., The movie camera, film camera or cine-camera is a type of photographic camera which takes a rapid sequence of photographs on an image sensor or on a film. In contrast to a still camera, which captures a single snapshot at a time, the movie camera takes a series of images; each image constitutes a "frame". This is accomplished through an intermittent mechanism. The frames are later played back in a movie projector at a specific speed, called the frame rate (number of frames per second). While viewing at a particular frame rate, a person's eyes and brain merge the separate pictures together to create the illusion of motion., The New York Stock Exchange (abbreviated as NYSE and nicknamed "The Big Board"), is an American stock exchange located at 11 Wall Street, Lower Manhattan, New York City, New York. It is by far the world's largest stock exchange by market capitalization of its listed companies at US$19.3 trillion as of June 2016. The average daily trading value was approximately 169 billion in 2013. The NYSE trading floor is located at 11 Wall Street and is composed of 21 rooms used for the facilitation of trading. A fifth trading room, located at 30 Broad Street, was closed in February 2007. The main building and the 11 Wall Street building were designated National Historic Landmarks in 1978., Canon has a primary listing on the Tokyo Stock Exchange and is a constituent of the TOPIX index. It has a secondary listing on the New York Stock Exchange. At the beginning of 2015, Canon was the tenth largest public company in Japan when measured by market capitalization., In optics, the f-number (sometimes called focal ratio, f-ratio, f-stop, or relative aperture) of an optical system is the ratio of the lens's focal length to the diameter of the entrance pupil. It is a dimensionless number that is a quantitative measure of lens speed, and an important concept in photography. The number is commonly notated using a hooked f, i.e. N, where N is the f-number., Subject: canon av-1, Relation: instance_of, Options: (A) 1 (B) april (C) brain (D) camera (E) canon (F) change (G) city (H) company (I) component (J) diameter (K) dimensionless number (L) distance (M) electronic circuit (N) exchange (O) index (P) instrumentation (Q) interface (R) june (S) laboratory (T) lens mount (U) lighting (V) market (W) meter (X) metric (Y) mode (Z) number ([) opening (\) person (]) photography (^) point (_) public company (`) range (a) rapid (b) ratio (c) ring (d) sequence (e) single (f) standard (g) still camera (h) stock exchange (i) thread (j) two (k) user (l) value (m) wall (n) will
Output: still camera