Question: it refers to a substance that speeds up chemical reactions
[{'answer': 'catalyst', 'provenance': [{'wikipedia_id': '6271', 'title': 'Chemical reaction', 'start_paragraph_id': 15, 'start_character': 323, 'end_paragraph_id': 15, 'end_character': 331, 'bleu_score': 1.0, 'section': 'Section::::Equations.\n'}]}, {'provenance': [{'wikipedia_id': '6271', 'title': 'Chemical reaction', 'start_paragraph_id': 41, 'start_character': 0, 'end_paragraph_id': 41, 'end_character': 329, 'bleu_score': 0.963949056609222, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 568848984951828564}, 'section': 'Section::::Kinetics.\n'}]}]