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.

Passage: After the defeat of the Confederacy, federal forces remained in Charleston during the city's reconstruction. The war had shattered the prosperity of the antebellum city. Freed slaves were faced with poverty and discrimination, but a large community of free people of color had been well-established in the city before the war and became the leaders of the postwar Republican Party and its legislators. Men who had been free people of color before the war comprised 26% of those elected to state and federal office in South Carolina from 1868 to 1876.
What percentage of those elected from 1868 to 1886 were Freemen?