Question: where does the fusion of sperm and egg occur
[{'answer': 'ampulla of the fallopian tube', 'provenance': [{'wikipedia_id': '3016568', 'title': 'Human fertilization', 'start_paragraph_id': 1, 'start_character': 84, 'end_paragraph_id': 1, 'end_character': 113, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '3016568', 'title': 'Human fertilization', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 311, 'bleu_score': 0.959574895300321, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 220438330406327560}, 'section': 'Section::::Abstract.'}]}]