Question: weapon that developed to help troops cross no mans land
[{'answer': 'mechanised weapons', 'provenance': [{'wikipedia_id': '994499', 'title': "No man's land", 'start_paragraph_id': 6, 'start_character': 889, 'end_paragraph_id': 6, 'end_character': 907, 'bleu_score': 1.0, 'section': 'Section::::World War I.\n'}]}, {'provenance': [{'wikipedia_id': '994499', 'title': "No man's land", 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 962, 'bleu_score': 0.866002239345348, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8127235008796462798}, 'section': 'Section::::World War I.\n'}]}]