In this task, you're given passages that contain mentions of names of people, places, or things. Some of these mentions refer to the same person, place, or thing. Your job is to write questions that evaluate one's understanding of such references. Good questions are expected to link pronouns (she, her, him, his, their, etc.) or other mentions to people, places, or things to which they may refer. Do not ask questions that can be answered correctly without understanding the paragraph or having multiple answers. Avoid questions that do not link phrases referring to the same entity. For each of your questions, the answer should be one or more phrases in the paragraph, and it should be unambiguous.

Ex Input:
Passage: A tsunami is an unusual form of wave caused by an infrequent powerful event such as an underwater earthquake or landslide, a meteorite impact, a volcanic eruption or a collapse of land into the sea. These events can temporarily lift or lower the surface of the sea in the affected area, usually by a few feet. The potential energy of the displaced seawater is turned into kinetic energy, creating a shallow wave, a tsunami, radiating outwards at a velocity proportional to the square root of the depth of the water and which therefore travels much faster in the open ocean than on a continental shelf. In the deep open sea, tsunamis have wavelengths of around 80 to 300 miles (130 to 480 km), travel at speeds of over 600 miles per hour (970 km/hr) and usually have a height of less than three feet, so they often pass unnoticed at this stage. In contrast, ocean surface waves caused by winds have wavelengths of a few hundred feet, travel at up to 65 miles per hour (105 km/h) and are up to 45 feet (14 metres) high.A trigger event on the continental shelf may cause a local tsunami on the land side and a distant tsunami that travels out across the ocean. The energy of the wave is dissipated only gradually, but is spread out over the wave front, so as the wave radiates away from the source, the front gets longer and the average energy reduces, so distant shores will, on average, be hit by weaker waves. However, as the speed of the wave is controlled by the water depth, it does not travel at the same speed in all directions, and this affects the direction of the wave front - an effect known as refraction - which can focus the strength of the advancing tsunami on some areas and weaken it in others according to undersea topography.
As a tsunami moves into shallower water its speed decreases, its wavelength shortens and its amplitude increases enormously, behaving in the same way as a wind-generated wave in shallow water, but on a vastly greater scale.  Either the trough or the crest of a tsunami can arrive at the coast first. In the former case, the sea draws back and leaves subtidal areas close to the shore exposed which provides a useful warning for people on land. When the crest arrives, it does not usually break but rushes inland, flooding all in its path. Much of the destruction may be caused by the flood water draining back into the sea after the tsunami has struck, dragging debris and people with it. Often several tsunami are caused by a single geological event and arrive at intervals of between eight minutes and two hours. The first wave to arrive on shore may not be the biggest or most destructive.  Occasionally, a tsunami may transform into a bore, typically in a shallow bay or an estuary.

Ex Output:
What two types of tsunami's can a trigger event on the continental shelf cause?


Ex Input:
Passage: The Stooges are wannabe detectives who inadvertently get their chance to crack a case in Scotland. They manage to stumble on a lead concerning the priceless Punjab diamond being stolen by a crook named Dapper. With dreams of becoming genuine detectives, the trio head for Squid McGuffy's cafe asking for the whereabouts of Dapper. They manage to convince everyone at the restaurant that they are actually police.
While searching several rooms above the cafe, the Stooges stumble on Dapper's moll, who hastily hides the Punjab diamond in a candy dish. The boys refuse to leave, suspecting Dapper will eventually show his face. While killing time, Shemp starts to flirt with the moll, and manages to swallow the ice along with some mints from the candy dish. The gal nearly has a nervous breakdown but quickly discovers the Stooges are not actually real detectives. She calls in Dapper and his henchman Muscles and frantically try to pry the diamond out of frazzled Shemp.
After all else fails, Dapper decides to cut him open. Moe and Larry are locked in a closet by Muscles while Shemp is tied down on a close by desk-turned-operating table. As luck would have it, there happen to be a bag of tools in the closet, which Moe and Larry use to saw their way out of the closet, and right into a gorilla's cage on the other side of the wall. The gorilla knocks Moe, Larry, Dapper and Muscles cold. The beast, however, befriends Shemp, and helps him cough up the diamond. Moments later, Shemp explains how he managed to swallow the diamond by actually doing so again.

Ex Output:
Who swallows the Punjab diamond?


Ex Input:
Passage: During ancient times, Gibraltar was regarded by the peoples of the Mediterranean as a place of religious and symbolic importance. The Phoenicians were present for several centuries, apparently using Gorham's Cave as a shrine to the genius loci of the place, as did the Carthaginians and Romans after them. Excavations in the cave have shown that pottery, jewellery and Egyptian scarabs were left as offerings to the gods, probably in the hope of securing safe passage through the dangerous waters of the Strait of Gibraltar.The Rock was revered by the Greeks and Romans as one of the two Pillars of Hercules, created by the demigod during his tenth labour when he smashed through a mountain separating the Atlantic and the Mediterranean. According to a Phocaean Greek traveller who visited in the sixth century BC, there were temples and altars to Hercules on the Rock where passing travellers made sacrifices. The Spanish later symbolised the importance of the Pillars of Hercules with a heraldic device consisting of a pair of columns with a scroll wrapped around them – a symbol that became the $ sign and the related Portuguese cifrão ().To the Ancient Romans, Gibraltar was known as Mons Calpe, a name perhaps derived from the Phoenician word kalph, "hollowed out", presumably in reference to the many limestone caves in the Rock. It was well-known to ancient geographers, but there is no known archaeological evidence of permanent settlements from the ancient period. According to the Roman writer Avienus, the ancient Greek traveller Euctemon recorded that
thirty stadia separate [the Pillars of Hercules]; [Euctemon] says that they bristle with woods all over and are always unwelcoming to seamen. Indeed he says that on those are both temples and altars to Hercules. He says that strangers sail there by boat to make offerings to the gods and depart hot foot thinking it wrong to linger ...

Ex Output:
What was the meaning of the word that the Ancient Romans name for Gibraltar was derived from?