Question: what was the strategy called to win back territory from the japanese in the pacific
[{'answer': 'Leapfrogging', 'provenance': [{'wikipedia_id': '1863884', 'title': 'Leapfrogging (strategy)', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 12, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'island hopping', 'provenance': [{'wikipedia_id': '1863884', 'title': 'Leapfrogging (strategy)', 'start_paragraph_id': 1, 'start_character': 28, 'end_paragraph_id': 1, 'end_character': 42, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1863884', 'title': 'Leapfrogging (strategy)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 405, 'bleu_score': 0.9694566079002921, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8773451526653801623}, 'section': 'Section::::Abstract.'}]}]