This task is about reading the given passage and construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) its answer is unique (iv) its answer is a continuous text span from the paragraph. Avoid creating questions that (i) can be answered correctly without actually understanding the paragraph and (ii) uses same words or phrases given in the passage.

Input: Consider Input: Due to its persistent cultural presence and to its novelty within the performing arts, wrestling constitutes a recurring topic in both academia and the media. Several documentaries have been produced looking at professional wrestling, most notably, Beyond the Mat directed by Barry W. Blaustein, and Wrestling with Shadows featuring wrestler Bret Hart and directed by Paul Jay. There have also been many fictional depictions of wrestling; the 2008 film The Wrestler received several Oscar nominations and began a career revival for star Mickey Rourke.

Output: What is one popular wrestling film?


Input: Consider Input: The timing of migration seems to be controlled primarily by changes in day length. Migrating birds navigate using celestial cues from the sun and stars, the earth's magnetic field, and probably also mental maps.

Output: What causes the timing of migration?


Input: Consider Input: The period known as classical antiquity began with the rise of the city-states of Ancient Greece. Greek influence reached its zenith under the expansive empire of Alexander the Great, spreading throughout Asia.


Output: What era started when Ancient Greek cities became self-governing entities?