Question: what is the main ingredient in table salt
[{'answer': 'sodium chloride ( NaCl )', 'provenance': [{'wikipedia_id': '1605200', 'title': 'Salt', 'start_paragraph_id': 1, 'start_character': 40, 'end_paragraph_id': 1, 'end_character': 63, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1605200', 'title': 'Salt', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 372, 'bleu_score': 0.805663609245936, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1641008385879462768}, 'section': 'Section::::Abstract.'}]}]