Detailed Instructions: 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.
Q: Questions: ['when did mary shelley write frankenstine?', 'when did shelley write frankenstein?', 'when was frankenstein written by mary shelley?', 'what year did mary sheeley write frankenstein?']
A:
1818