instruction:
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.
question:
Passage: The term "Sumerian" is the common name given to the ancient non-Semitic inhabitants of Mesopotamia, Sumer, by the Semitic Akkadians. The Sumerians referred to themselves as ug sag gig-ga (cuneiform: ), phonetically /u sa giga/, literally meaning "the black-headed people", and to their land as ki-en-gi(-r) ('place' + 'lords' + 'noble'), meaning "place of the noble lords". The Akkadian word Shumer may represent the geographical name in dialect, but the phonological development leading to the Akkadian term sumeru is uncertain. Hebrew Shinar, Egyptian Sngr, and Hittite Sanhar(a), all referring to southern Mesopotamia, could be western variants of Shumer.
answer:
What is the common name for the Semitic people Mesopotamia?

question:
Passage: Labour improved its performance in 1987, gaining 20 seats and so reducing the Conservative majority from 143 to 102. They were now firmly re-established as the second political party in Britain as the Alliance had once again failed to make a breakthrough with seats. A merger of the SDP and Liberals formed the Liberal Democrats. Following the 1987 election, the National Executive Committee resumed disciplinary action against members of Militant, who remained in the party, leading to further expulsions of their activists and the two MPs who supported the group.
answer:
When did Labour worsen its performance?

question:
Passage: The Canadian Armed Forces have a total reserve force of approximately 50,000 primary and supplementary that can be called upon in times of national emergency or threat. For the components and sub-components of the Canadian Armed Forces Reserve Force, the order of precedence follows:
answer:
When can't the reserve force be called upon?