Question: where does excystation of mature entamoeba histolytica cysts occur
[{'answer': 'digestive tract', 'provenance': [{'wikipedia_id': '334768', 'title': 'Entamoeba histolytica', 'start_paragraph_id': 4, 'start_character': 743, 'end_paragraph_id': 4, 'end_character': 758, 'bleu_score': 1.0, 'section': 'Section::::Transmission.\n'}]}, {'provenance': [{'wikipedia_id': '334768', 'title': 'Entamoeba histolytica', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 888, 'bleu_score': 0.512176348452531, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8413289024369412463}, 'section': 'Section::::Transmission.\n'}]}]