Definition: In this task, you are given triplets. Each triplet is in the form of [subject, predicate, object]. Your task is to generate proper sentence that utilizes these triples. The objective is to construct a sentence that (a) captures the facts specified in the triples and (b) is a well-formed sentence easily understandable by a human. All triple values need not be used directly in the sentence as long as the facts are adequately captured.
Input: [['United States', 'ETHNIC_GROUP', 'Native Americans in the United States'], ['United States', 'LANGUAGE', 'English language'], ['United States', 'LEADER_TITLE', 'President of the United States'], ['United States', 'LEADER_NAME', 'John Roberts'], ['250 Delaware Avenue', 'LOCATION', 'United States']]

250 Delaware Avenue is located in the United States which has English as it's language and the ethnic group of Native Americans can be found. The leader of the US is titled the President and the current Chief Justice is John Roberts.