You will be given a definition of a task first, then some input of the task.
From the given sentence, extract the phrase (often noun or verb) that carries the given relationship. The generated phrase should be present in the sentence.

Given Relationship: 'file to', Sentence: 'Xilisoft WMA MP3 Converter e ' un eccellente WMA to MP3 converter con tante ... MP4 , WMA , OGG , AAC , APE , VQF , MPEG , etc . e li puconvertire in WMA e MP3 files .'
Output:
files