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: [['A Fortress of Grey Ice', 'LANGUAGE', 'English language'], ['English language', 'SPOKEN_IN', 'Great Britain'], ['United States', 'CAPITAL', 'Washington, D.C.'], ['A Fortress of Grey Ice', 'COUNTRY', 'United States'], ['United States', 'ETHNIC_GROUP', 'Native Americans in the United States']]

The language of Great Britain is English, and this was used in the original publication of A Fortress of Grey Ice. The book is, however, from the United States where the capital city is Washington DC. The country is also where the Native Americans are known as an ethnic group.