Question: where did most of the fighting take place in ww1
[{'answer': 'European theatre', 'provenance': [{'wikipedia_id': '4952298', 'title': 'European theatre of World War I', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 16, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '4952298', 'title': 'European theatre of World War I', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 371, 'bleu_score': 0.8500997039632111, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14541578541731060768}, 'section': 'Section::::Abstract.'}]}]