Question: the quadriceps femoris is composed of three vastus muscles and the
[{'answer': 'rectus femoris', 'provenance': [{'wikipedia_id': '911778', 'title': 'Quadriceps femoris muscle', 'start_paragraph_id': 16, 'start_character': 135, 'end_paragraph_id': 16, 'end_character': 149, 'bleu_score': 1.0, 'section': 'Section::::Function.\n'}]}]