Definition: 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.
Input: [['United States', 'LANGUAGE', 'English language'], ['United States', 'LEADER_TITLE', 'President of the United States'], ['United States', 'LEADER_NAME', 'Joe Biden'], ['250 Delaware Avenue', 'LOCATION', 'United States'], ['United States', 'ETHNIC_GROUP', 'Asian Americans']]

250 Delaware Avenue is located in the _____, where the leader is know as the President of the United States. One of the leaders in the US is _____ and an ethnic group of the United States (where English is the language) is Asian Americans.