Given a passage and a question, find the answer to the question based on the passage. The answer should consist of only one word that lies in the span of only one of the sentences in the passage.

Input: Consider Input: Paragraph: Halley 's Comet or Comet Halley , officially designated 1P / Halley , is a short - period comet visible from Earth every 74 -- 79 years . Halley is the only known short - period comet that is regularly visible to the naked eye from Earth , and the only naked - eye comet that might appear twice in a human lifetime . Halley last appeared in the inner parts of the Solar System in 1986 and will next appear in mid-2061 .
Question: when is halley's comet coming around again


Output: mid-2061


Input: Consider Input: Paragraph: A week is a time unit equal to seven days . It is the standard time period used for cycles of rest days in most parts of the world , mostly alongside -- although not strictly part of -- the Gregorian calendar .
Question: 1 week is equal to how many days


Output: seven


Input: Consider Input: Paragraph: The Indian astronomer Aryabhata used a value of 3.1416 in his Āryabhaṭīya ( 499 AD ) . Fibonacci in c. 1220 computed 3.1418 using a polygonal method , independent of Archimedes . Italian author Dante apparently employed the value 3 + √ 2 / 10 ≈ 3.14142 .
Question: who calculated the value of pi in india



Output: Aryabhata


