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: [['Alan Bean', 'NATIONALITY', 'United States'], ['Alan Bean', 'WAS_A_CREW_MEMBER_OF', 'Apollo 12'], ['Alan Bean', 'WAS_SELECTED_BY_NASA', '1963']]

Alan Bean, a US national, was selected by Nasa in 1963 and served as a crew member of Apollo 12.