Given the task definition, example input & output, solve the new input case.
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.
Example: Passage: Nearing London, Oliver encounters Jack Dawkins, a pickpocket more commonly known by the nickname the "Artful Dodger", and his sidekick, a boy of a humorous nature named Charley Bates, but Oliver's innocent and trusting nature fails to see any dishonesty in their actions. The Dodger provides Oliver with a free meal and tells him of a gentleman in London who will "give him lodgings for nothing, and never ask for change". Grateful for the unexpected assistance, Oliver follows the Dodger to the "old gentleman's" residence. In this way Oliver unwittingly falls in with an infamous Jewish criminal known as Fagin, the gentleman of whom the Artful Dodger spoke. Ensnared, Oliver lives with Fagin and his gang of juvenile pickpockets in their lair at Saffron Hill for some time, unaware of their criminal occupations. He believes they make wallets and handkerchiefs.
Output: Who believes Fagin's gang make wallets and handkerchiefs?.
This question is based on the following sentence in the passage "He believes they make wallets and handkerchiefs". It evaluates the understanding that the pronoun "he" refers to name "Oliver". You can ask questions like this one about most pronouns in a paragraph.

New input case for you: 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 ...
Output:
What was the meaning of the word that the Ancient Romans name for Gibraltar was derived from?