Question: where did the original habitants of japan come from
[{'answer': 'Ainu', 'provenance': [{'wikipedia_id': '186932', 'title': 'Japanese people', 'start_paragraph_id': 20, 'start_character': 167, 'end_paragraph_id': 20, 'end_character': 171, 'bleu_score': 1.0, 'section': 'Section::::History.:Theories of origins.\n'}]}, {'provenance': [{'wikipedia_id': '186932', 'title': 'Japanese people', 'start_paragraph_id': 20, 'start_character': 0, 'end_paragraph_id': 20, 'end_character': 457, 'bleu_score': 0.6063879422925941, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14919972357585864843}, 'section': 'Section::::History.:Theories of origins.\n'}]}]