Instructions: This task is about creating an unanswerable question based on a given passage. Construct a question that looks relevant to the given context but is unanswerable. Following are a few suggestions about how to create unanswerable questions:
(i) create questions which require satisfying a constraint that is not mentioned in the passage
(ii) create questions which require information beyond what is provided in the passage in order to answer
(iii) replace an existing entity, number, date mentioned in the passage with other entity, number, date and use it in the question
(iv) create a question which is answerable from the passage and then replace one or two words by their antonyms or insert/remove negation words to make it unanswerable.
Input: Passage: Amid preparations for the coronation, Princess Margaret informed her sister that she wished to marry Peter Townsend, a divorce' 16 years Margaret's senior, with two sons from his previous marriage. The Queen asked them to wait for a year; in the words of Martin Charteris, "the Queen was naturally sympathetic towards the Princess, but I think she thoughtshe hopedgiven time, the affair would peter out." Senior politicians were against the match and the Church of England did not permit remarriage after divorce. If Margaret had contracted a civil marriage, she would have been expected to renounce her right of succession. Eventually, she decided to abandon her plans with Townsend. In 1960, she married Antony Armstrong-Jones, who was created Earl of Snowdon the following year. They divorced in 1978; she did not remarry.
Output:
What is the name of one of Peter Townsend's sons?