Information:  - The Flettner Fl 282 Kolibri ( `` Hummingbird '' ) is a single - seat open cockpit intermeshing rotor helicopter , or synchropter , produced by Anton Flettner of Germany . According to Yves Le Bec , the Flettner Fl 282 was the world 's first series production helicopter .  - Anton Flettner (November 1, 1885  December 29, 1961) was a German aviation engineer and inventor. He made important contributions to airplane and helicopter design. He was born in Eddersheim (today a district of Hattersheim am Main).  - A helicopter is a type of rotorcraft in which lift and thrust are supplied by rotors. This allows the helicopter to take off and land vertically, to hover, and to fly forward, backward, and laterally. These attributes allow helicopters to be used in congested or isolated areas where fixed-wing aircraft and many forms of VTOL (vertical takeoff and landing) aircraft cannot perform.  - A fixed-wing aircraft is an aircraft, such as an aeroplane, which is capable of flight using wings that generate lift caused by the vehicle's forward airspeed and the shape of the wings. Fixed-wing aircraft are distinct from rotary-wing aircraft, in which the wings form a rotor mounted on a spinning shaft, and ornithopters, in which the wings flap in similar manner to a bird.  - Hattersheim am Main is a town in the Main-Taunus district, Hesse (Germany) and part of the Frankfurt Rhein-Main urban area.  - A rotorcraft or rotary-wing aircraft is a heavier-than-air flying machine that uses lift generated by wings, called rotary wings or rotor blades, that revolve around a mast. Several rotor blades mounted on a single mast are referred to as a rotor. The International Civil Aviation Organization (ICAO) defines a rotorcraft as "supported in flight by the reactions of the air on one or more rotors". Rotorcraft generally include those aircraft where one or more rotors are required to provide lift throughout the entire flight, such as helicopters, cyclocopters, autogyros, and gyrodynes. Compound rotorcraft may also include additional thrust engines or propellers and static lifting surfaces.  - Thrust is a reaction force described quantitatively by Newton's second and third laws. When a system expels or accelerates mass in one direction, the accelerated mass will cause a force of equal magnitude but opposite direction on that system. The force applied on a surface in a direction perpendicular or normal to the surface is called thrust. Force, and thus thrust, is measured in the International System of Units (SI) as the newton (symbol: N), and represents the amount needed to accelerate 1 kilogram of mass at the rate of 1 meter per second per second.  - C is the third letter in the English alphabet and a letter of the alphabets of many other writing systems which inherited it from the Latin alphabet. It is also the third letter of the ISO basic Latin alphabet. It is named "cee" (pronounced ) in English.  - A vertical take-off and landing (VTOL) aircraft is one that can hover, take off, and land vertically. This classification includes fixed-wing aircraft as well as helicopters and other aircraft with powered rotors, such as cyclogyros/cyclocopters and tiltrotors. Some VTOL aircraft can operate in other modes as well, such as CTOL (conventional take-off and landing), STOL (short take-off and landing), and/or STOVL (short take-off and vertical landing). Others, such as some helicopters, can only operate by VTOL, due to the aircraft lacking landing gear that can handle horizontal motion. VTOL is a subset of V/STOL (vertical and/or short take-off and landing).    After reading the paragraphs above, we are interested in knowing the entity with which 'flettner fl 282' exhibits the relationship of 'instance of'. Find the answer from the choices below.  Choices: - 1  - aircraft  - airplane  - alphabet  - area  - december  - direction  - district  - force  - helicopter  - letter  - magnitude  - mass  - motion  - november  - organization  - part  - rotorcraft  - single  - subset  - surface  - system  - town  - vehicle  - vertical takeoff and landing  - wing
airplane

Information:  - World Book Day or World Book and Copyright Day (also known as International Day of the Book or World Book Days) is a yearly event on April 23rd, organized by the United Nations Educational, Scientific and Cultural Organization (UNESCO), to promote reading, publishing and copyright. In the United Kingdom, the day is recognized on the first Thursday in March. World Book Day was celebrated for the first time on 23 April 1995.  - The Territory of Nevada was an organized incorporated territory of the United States that existed from March 2, 1861, until October 31, 1864, when it was admitted to the Union as the State of Nevada.  - Caroline Lawrence (born 1954) is an English American author, best known for "The Roman Mysteries" series of historical novels for children. The series is about a Roman girl called Flavia and her three friends: Nubia (a freed slave girl), Jonathan (a shunned Jewish boy) and Lupus (a beggar boy without a tongue). The series has won numerous awards and has been published in many different languages worldwide. In March 2010, Lawrence was commissioned to write another history mystery series of books called The Western Mysteries, set in Virginia City, Nevada Territory in the early 1860s.  - The Code of Romulus is a children 's novella by Caroline Lawrence , published in 2007 to celebrate the 10th anniversary of World Book Day . It is a re-publication of the short story Bread and Circuses that appeared in the anthology The Mammoth Book of Roman Whodunits published in 2003 . The story takes place in Ostia in November 79 AD , between the events of the fifth and sixth books ( The Dolphins of Laurentum and The Twelve Tasks of Flavia Gemina . )  - The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a sovereign country in western Europe. Lying off the north-western coast of the European mainland, it includes the island of Great Britain (the name of which is also loosely applied to the whole country), the north-eastern part of the island of Ireland, and many smaller islands. Northern Ireland is the only part of the UK that shares a land border with another sovereign statethe Republic of Ireland. Apart from this land border, the UK is surrounded by the Atlantic Ocean, with the North Sea to its east, the English Channel to its south and the Celtic Sea to its south-south-west, giving it the 12th-longest coastline in the world. The Irish Sea lies between Great Britain and Ireland. With an area of , the UK is the 78th-largest sovereign state in the world and the 11th-largest in Europe. It is also the 21st-most populous country, with an estimated 65.1 million inhabitants. Together, this makes it the fourth most densely populated country in the European Union.  - The Roman Mysteries is a series of historical novels for children by Caroline Lawrence. The first book, "The Thieves of Ostia", was published in 2001, finishing with "The Man from Pomegranate Street", published in 2009, and 17 more novels were planned, plus a number of "mini-mysteries" and companion titles.    After reading the paragraphs above, we are interested in knowing the entity with which 'the code of romulus' exhibits the relationship of 'series'. Find the answer from the choices below.  Choices: - 2  - populous  - the roman mysteries
the roman mysteries