Question: how many tribes are there in the philippines
[{'answer': 'more than 175 ethnolinguistic nations', 'provenance': [{'wikipedia_id': '2713415', 'title': 'Ethnic groups in the Philippines', 'start_paragraph_id': 1, 'start_character': 32, 'end_paragraph_id': 1, 'end_character': 69, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2713415', 'title': 'Ethnic groups in the Philippines', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 488, 'bleu_score': 0.8908309359341171, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2354689717932053070}, 'section': 'Section::::Abstract.'}]}]