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: The Government was known officially as the Council of People's Commissars (19171946), Council of Ministers (19461978) and Council of MinistersGovernment (19781991). The first government was headed by Vladimir Lenin as "Chairman of the Council of People's Commissars of the Russian SFSR" and the last by Boris Yeltsin as both head of government and head of state under the title "President".
Output:
What was the government of the RSFSR called up to 1964?