Given an trivia question precisely answer the question with a word/phrase/name. External resources such as Wikipedia could be used to obtain the facts.
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Question: Lester B. Pearson Airport serves which Commonwealth city?

Answer: toronto


Question: What word is used in mathematics to mean if and only if?

Answer: if and only if


Question:  'Elmo's World' was a segment of which children's television show?

Answer:
sesame street