This task is about writing a correct answer for the reading comprehension task. Based on the information provided in a given passage, you should identify the shortest continuous text span from the passage that serves as an answer to the given question. Avoid answers that are incorrect or provides incomplete justification for the question.

Ex Input:
Passage: Uranium is a naturally occurring element that can be found in low levels within all rock, soil, and water. Uranium is the 51st element in order of abundance in the Earth's crust. Uranium is also the highest-numbered element to be found naturally in significant quantities on Earth and is almost always found combined with other elements. Along with all elements having atomic weights higher than that of iron, it is only naturally formed in supernovae. The decay of uranium, thorium, and potassium-40 in the Earth's mantle is thought to be the main source of heat that keeps the outer core liquid and drives mantle convection, which in turn drives plate tectonics. Question: Where does uranium rank among elements in terms of its abundance in the Earth's crust?

Ex Output:
51st


Ex Input:
Passage: The tradition holds that Virgil was born in the village of Andes, near Mantua in Cisalpine Gaul. Analysis of his name has led to beliefs that he descended from earlier Roman colonists. Modern speculation ultimately is not supported by narrative evidence either from his own writings or his later biographers. Macrobius says that Virgil's father was of a humble background; however, scholars generally believe that Virgil was from an equestrian landowning family which could afford to give him an education. He attended schools in Cremona, Mediolanum, Rome and Naples. After considering briefly a career in rhetoric and law, the young Virgil turned his talents to poetry. Question: In which cities did Virgil attend schools?

Ex Output:
Cremona, Mediolanum, Rome and Naples


Ex Input:
Passage: The Universal Film Manufacturing Company was incorporated in New York on April 30, 1912. Laemmle, who emerged as president in July 1912, was the primary figure in the partnership with Dintenfass, Baumann, Kessel, Powers, Swanson, Horsley, and Brulatour. Eventually all would be bought out by Laemmle. The new Universal studio was a vertically integrated company, with movie production, distribution and exhibition venues all linked in the same corporate entity, the central element of the Studio system era. Question: Along with exhibition and distribution, what business did the Universal Film Manufacturing Company engage in?

Ex Output:

movie production