Question: the main product of photosynthesis used by plants is
[{'answer': 'carbohydrate molecules', 'provenance': [{'wikipedia_id': '24544', 'title': 'Photosynthesis', 'start_paragraph_id': 1, 'start_character': 204, 'end_paragraph_id': 1, 'end_character': 226, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '24544', 'title': 'Photosynthesis', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 790, 'bleu_score': 0.9542174745769371, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8398229843455763575}, 'section': 'Section::::Abstract.'}]}]