Teacher:In this task, you're given a statement, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.
Teacher: Now, understand the problem? Solve this instance: Context: his wife Isabella Machell, daughter of John Machell, Member of Parliament Link Information: John Machell (1637-1704) was for twenty years Member of Parliament for Horsham, Sussex, during the reigns of Charles II, James II and William III and Mary II. Question: What years was Isabella Machell's father a Member of Parliament?
Student:
Answer: twenty years