Question: how does a black mamba kill its prey
[{'answer': 'venom', 'provenance': [{'wikipedia_id': '2350760', 'title': 'Black mamba', 'start_paragraph_id': 1, 'start_character': 68, 'end_paragraph_id': 1, 'end_character': 73, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2350760', 'title': 'Black mamba', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 621, 'bleu_score': 0.6489096676560491, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2508679632952969758}, 'section': 'Section::::Abstract.'}]}]