Question: where do typhoons that reach the philippines form
[{'answer': 'northwestern Pacific Ocean', 'provenance': [{'wikipedia_id': '3092190', 'title': 'Typhoon', 'start_paragraph_id': 1, 'start_character': 1007, 'end_paragraph_id': 1, 'end_character': 1033, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '3092190', 'title': 'Typhoon', 'start_paragraph_id': 1, 'start_character': 867, 'end_paragraph_id': 1, 'end_character': 1105, 'bleu_score': 0.51010015287757, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17967225795006113094}, 'section': 'Section::::Abstract.'}]}]