Question: the key invention of the neolithic era was the development of
[{'answer': 'farming', 'provenance': [{'wikipedia_id': '21189', 'title': 'Neolithic', 'start_paragraph_id': 1, 'start_character': 150, 'end_paragraph_id': 1, 'end_character': 157, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]