Question: what names are given to the materials at the end of a chemical reaction
[{'answer': 'Chemical equations', 'provenance': [{'wikipedia_id': '6271', 'title': 'Chemical reaction', 'start_paragraph_id': 14, 'start_character': 0, 'end_paragraph_id': 14, 'end_character': 18, 'bleu_score': 1.0, 'section': 'Section::::Equations.\n'}]}, {'provenance': [{'wikipedia_id': '6271', 'title': 'Chemical reaction', 'start_paragraph_id': 14, 'start_character': 0, 'end_paragraph_id': 14, 'end_character': 781, 'bleu_score': 0.9239571721364671, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12950136109263240106}, 'section': 'Section::::Equations.\n'}]}]