Question: what was the purpose of the zeppelin in ww1
[{'answer': 'bombers', 'provenance': [{'wikipedia_id': '34440', 'title': 'Zeppelin', 'start_paragraph_id': 1, 'start_character': 754, 'end_paragraph_id': 1, 'end_character': 761, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '34440', 'title': 'Zeppelin', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 825, 'bleu_score': 0.937504572471431, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10055101391882206033}, 'section': 'Section::::Abstract.'}]}]