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.

Ex Input:
Questions: ['date of japen joining the united nation?']

Ex Output:
1956


Ex Input:
Questions: ['when did the song firework come out?', "when did katy perry's firework song come out?", 'when did the song firework by katy perry come out?', 'what year did katy perry fireworks come out?', 'when did the song firework come out by katy perry?', 'when did firework by katty perry come out?', 'when was the song firework released?']

Ex Output:
2010


Ex Input:
Questions: ['what year did elvis record his first song?']

Ex Output:

1954