Teacher:In this task you are given a list of triplets of the form [subject, predicate, object] and the output should be a question based on the triplets but with the subject and/or object replaced with blanks (represented using two or more consecutive underscores). Triplet values encompassed in [*] are special tokens that can be replaced with synonyms. The objective is to construct a question in a manner that (a) captures the facts specified in at least one of the triplets, and (b) ideally contains a limited number of blanks such that it is a well-formed question that is easy to answer. A blank can represent a single word or a phrase.
Teacher: Now, understand the problem? Solve this instance: [['Hindi', '1991_CENSUSINDIAN_CENSUS_[2]_(TOTAL_POPULATION_838.14_MILLION):_SPEAKERS', '337,272,114'], ['Hindi', '2001_CENSUS[1]_(TOTAL_POPULATION_1,004.59_MILLION):_SPEAKERS', '422,048,642']]
Student:
There are _____ speakers of _____ in 1991 and 422,048,642 speakers of Hindi in 2001 and