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: In republics with a parliamentary system ( such as India , Germany , Austria , Italy and Israel ) the head of state is usually titled president and the principal functions of such presidents are mainly ceremonial and symbolic , as opposed to the presidents in a presidential or semi-presidential system .
Question: what do we call the head of state in india

Output:
president