Question: where is collagen found in the human body
[{'answer': 'scar tissue'}, {'answer': 'tendons', 'provenance': [{'wikipedia_id': '6058', 'title': 'Collagen', 'start_paragraph_id': 1, 'start_character': 394, 'end_paragraph_id': 1, 'end_character': 401, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'skin', 'provenance': [{'wikipedia_id': '6058', 'title': 'Collagen', 'start_paragraph_id': 1, 'start_character': 418, 'end_paragraph_id': 1, 'end_character': 422, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'artery walls'}, {'answer': 'cornea', 'provenance': [{'wikipedia_id': '6058', 'title': 'Collagen', 'start_paragraph_id': 2, 'start_character': 182, 'end_paragraph_id': 2, 'end_character': 188, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'endomysium surrounding muscle fibers'}, {'answer': 'fibrocartilage'}, {'answer': 'organic part of bones and teeth'}]