TASK DEFINITION: Given a question and its paraphrases, answer the question. The answer should exactly answer all the questions given without any ambiguity. Don't give partial answers.
PROBLEM: Questions: ['what did did canada join nato?', 'what yer did canada join nato?', 'what year did canadians join nato?']

SOLUTION: 1949

PROBLEM: Questions: ['number of languages spoken in the eu?']

SOLUTION: 24

PROBLEM: Questions: ['what year did the us declare a war on spain?', 'when did the us declare war on spain?', 'when did the us declare war on spain?', 'when did the president declare war on spain?']

SOLUTION:
1898