Teacher: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.
Teacher: Now, understand the problem? Solve this instance: Paragraph: A company in New York City in the United States first offered installation of air conditioning for cars in 1933 . Most of their customers operated limousines and luxury cars .
Question: when did cars start to have air conditioning

Student:
1933