Question: what component of the cell is the site of polypeptide assembly
[{'answer': 'ribosome', 'provenance': [{'wikipedia_id': '25766', 'title': 'Ribosome', 'start_paragraph_id': 1, 'start_character': 555, 'end_paragraph_id': 1, 'end_character': 563, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '25766', 'title': 'Ribosome', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 636, 'bleu_score': 0.766294291292657, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2417317250402349766}, 'section': 'Section::::Abstract.'}]}]