Problem: The Mīmāṃsā school has several subschools defined by epistemology. The Prābhākara subschool of Mīmāṃsā considered five epistemically reliable means to gaining knowledge: pratyakṣa (perception), anumāṇa (inference), upamāṇa (comparison and analogy), arthāpatti (postulation, derivation from circumstances), and śabda (word, testimony of past or present reliable experts). The Kumārila Bhaṭṭa sub-school of Mīmāṃsā added sixth to its canon of reliable epistemology - anupalabdi (non-perception, negative/cognitive proof).
How many ways does the Mimamsa separate into subschools?
The answer is the following: several

Problem: Following his victory in the Battle of Hastings, William, Duke of Normandy, was crowned King of England in the newly finished Westminster Abbey on Christmas Day 1066. William constructed the Tower of London, the first of the many Norman castles in England to be rebuilt in stone, in the southeastern corner of the city, to intimidate the native inhabitants. In 1097, William II began the building of Westminster Hall, close by the abbey of the same name. The hall became the basis of a new Palace of Westminster.
On what day did Duke William II of Normandy become King of England?
The answer is the following: Christmas Day 1066

Problem: In 2007, the official Xinhua News Agency reported that the resolution of the BeiDou system was as high as 0.5 metres. With the existing user terminals it appears that the calibrated accuracy is 20m (100m, uncalibrated).
What is the calibrated accuracy of the BeiDou system?
The answer is the following: 20m

Problem: In 1991, US President George H. W. Bush awarded Hayek the Presidential Medal of Freedom, one of the two highest civilian awards in the United States, for a "lifetime of looking beyond the horizon". Hayek died on 23 March 1992 in Freiburg, Germany, and was buried on 4 April in the Neustift am Walde cemetery in the northern outskirts of Vienna according to the Catholic rite. In 2011, his article The Use of Knowledge in Society was selected as one of the top 20 articles published in the American Economic Review during its first 100 years.
Which President presented the award to Hayek?
The answer is the following:
George H. W. Bush