Given the task definition, example input & output, solve the new input case.
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.
Example: Paragraph: Nix v. Hedden , 149 U.S. 304 ( 1893 ) , was a decision by the Supreme Court of the United States that , under U.S. customs regulations , the tomato should be classified as a vegetable rather than a fruit . The Court 's unanimous opinion held that the Tariff Act of 1883 used the ordinary meaning of the words `` fruit '' and `` vegetable , '' instead of the technical botanical meaning .
Question: is tomato a fruit or vegetable us supreme court

Output: vegetable
The answer 'vegetable' is correct as it lies in the sentence - "Nix v. Hedden , 149 U.S. 304 ( 1893 ) , was a decision by the Supreme Court of the United States that , under U.S. customs regulations , the tomato should be classified as a vegetable rather than a fruit ", which is a part of the passage.

New input case for you: Paragraph: To Kill a Mockingbird is a novel by Harper Lee published in 1960 . It was immediately successful , winning the Pulitzer Prize , and has become a classic of modern American literature . The plot and characters are loosely based on Lee 's observations of her family , her neighbors and an event that occurred near her hometown of Monroeville , Alabama , in 1936 , when she was 10 years old .
Question: when did to kill a mockingbird come out

Output:
1960