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: Until the military coup of 22 March 2012 and a second military coup in December 2012, Mali was a constitutional democracy governed by the Constitution of 12 January 1992, which was amended in 1999. The constitution provides for a separation of powers among the executive, legislative, and judicial branches of government. The system of government can be described as "semi-presidential". Executive power is vested in a president, who is elected to a five-year term by universal suffrage and is limited to two terms.
Output:
What was amended in 1992?