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.

Q: Passage: The most precise timekeeping device of the ancient world was the water clock, or clepsydra, one of which was found in the tomb of Egyptian pharaoh Amenhotep I (15251504 BC). They could be used to measure the hours even at night, but required manual upkeep to replenish the flow of water. The Ancient Greeks and the people from Chaldea (southeastern Mesopotamia) regularly maintained timekeeping records as an essential part of their astronomical observations. Arab inventors and engineers in particular made improvements on the use of water clocks up to the Middle Ages. In the 11th century, Chinese inventors and engineers invented the first mechanical clocks driven by an escapement mechanism.

A: What device was invented by the ancient Greeks?
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Q: Passage: India started the construction of a 40,000-tonne, 260-metre-long (850 ft) Vikrant-class aircraft carrier in 2009. The new carrier will operate MiG-29K and naval HAL Tejas aircraft along with the Indian-made helicopter HAL Dhruv. The ship will be powered by four gas-turbine engines and will have a range of 8,000 nautical miles (15,000 kilometres), carrying 160 officers, 1,400 sailors, and 30 aircraft. The carrier is being constructed by Cochin Shipyard. The ship was launched in August 2013 and is scheduled for commissioning in 2018.

A: Who finished construction of a 40,000-tonne Vikrant-class carrier in 2009?
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Q: Passage: As part of its education-related initiatives, the foundation has funded journalists, think tanks, lobbying organizations and governments. Millions of dollars of grants to news organizations have funded reporting on education and higher education, including more than $1.4 million to the Education Writers Association to fund training for journalists who cover education. While some critics have feared the foundation for directing the conversation on education or pushing its point of view through news coverage, the foundation has said it lists all its grants publicly and does not enforce any rules for content among its grantees, who have editorial independence. Union activists in Chicago have accused Gates Foundation grantee Teach Plus, which was founded by new teachers and advocates against seniority-based layoffs, of "astroturfing".

A:
What have journalists accused Teach Plus of?
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