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.
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Question: Passage: Compression is useful because it helps reduce resource usage, such as data storage space or transmission capacity. Because compressed data must be decompressed to use, this extra processing imposes computational or other costs through decompression; this situation is far from being a free lunch. Data compression is subject to a space–time complexity trade-off. For instance, a compression scheme for video may require expensive hardware for the video to be decompressed fast enough to be viewed as it is being decompressed, and the option to decompress the video in full before watching it may be inconvenient or require additional storage. The design of data compression schemes involves trade-offs among various factors, including the degree of compression, the amount of distortion introduced (when using lossy data compression), and the computational resources required to compress and decompress the data.

Answer: What helps reduce trade-offs?


Question: Passage: Tajikistan is officially a republic, and holds elections for the presidency and parliament, operating under a presidential system. It is, however, a dominant-party system, where the People's Democratic Party of Tajikistan routinely has a vast majority in Parliament. Emomalii Rahmon has held the office of President of Tajikistan continually since November 1994. The Prime Minister is Kokhir Rasulzoda, the First Deputy Prime Minister is Matlubkhon Davlatov and the two Deputy Prime Ministers are Murodali Alimardon and Ruqiya Qurbanova.

Answer: Who operates under a communist system?


Question: Passage: Following the death of Husayn, Ibn al-Zubayr, although remaining in Mecca, was associated with two opposition movements, one centered in Medina and the other around Kharijites in Basra and Arabia. Because Medina had been home to Muhammad and his family, including Husayn, word of his death and the imprisonment of his family led to a large opposition movement. In 683, Yazid dispatched an army to subdue both movements. The army suppressed the Medinese opposition at the Battle of al-Harrah. The Grand Mosque in Medina was severely damaged and widespread pillaging caused deep-seated dissent. Yazid's army continued on and laid siege to Mecca. At some point during the siege, the Kaaba was badly damaged in a fire. The destruction of the Kaaba and Grand Mosque became a major cause for censure of the Umayyads in later histories of the period.

Answer:
How many opposition movements was Husayn associated with?