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: [['3', 'WINNER', 'Rudy Matthijs (BEL)'], ['Valenciennes - Roubaix', 'LENGTH', '152 km (94 mi)'], ['3', 'ROUTE', 'Valenciennes - Roubaix'], ['Valenciennes - Roubaix', 'TERRAIN', 'Hilly stage'], ['3', 'DATE', '4 July']]

On July 4, Rudy Matthijs wins stage 3 on route _____ which has a length 152 km (94 mi) on Hilly stage