Given the task definition, example input & output, solve the new input case.
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.
Example: Passage: In 1763, Spain traded Florida to the Kingdom of Great Britain for control of Havana, Cuba, which had been captured by the British during the Seven Years' War. It was part of a large expansion of British territory following the country's victory in the Seven Years' War. Almost the entire Spanish population left, taking along most of the remaining indigenous population to Cuba. The British soon constructed the King's Road connecting St. Augustine to Georgia. The road crossed the St. Johns River at a narrow point, which the Seminole called Wacca Pilatka and the British named "Cow Ford", both names ostensibly reflecting the fact that cattle were brought across the river there.
Output: Who owned Cuba after the Eight Years War?
This question appears to be relevant to the passage as both involves words such as 'Cuba' and 'War' which also exist in the passage. The passage mentions that "after the war, almost the entire Spanish population left, taking along most of the remaining indigenous population to Cuba". This information is not sufficient to conclude that which country owned cuba.

New input case for you: Passage: Spielberg first met actress Amy Irving in 1976 at the suggestion of director Brian De Palma, who knew he was looking for an actress to play in Close Encounters. After meeting her, Spielberg told his co-producer Julia Phillips, "I met a real heartbreaker last night.":293 Although she was too young for the role, she and Spielberg began dating and she eventually moved in to what she described as his "bachelor funky" house.:294 They lived together for four years, but the stresses of their professional careers took a toll on their relationship. Irving wanted to be certain that whatever success she attained as an actress would be her own: "I don't want to be known as Steven's girlfriend," she said, and chose not to be in any of his films during those years.:295
Output:
In what year did Brian de Palma direct his first film?