Question: who did dos anjos beat for the title
[{'answer': 'Anthony Pettis', 'provenance': [{'wikipedia_id': '18427840', 'title': 'Rafael dos Anjos', 'start_paragraph_id': 2, 'start_character': 300, 'end_paragraph_id': 2, 'end_character': 314, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '18427840', 'title': 'Rafael dos Anjos', 'start_paragraph_id': 26, 'start_character': 0, 'end_paragraph_id': 26, 'end_character': 378, 'bleu_score': 0.970362113628587, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11385747733159675881}, 'section': 'Section::::Mixed martial arts career.:Ultimate Fighting Championship.:UFC Lightweight Championship.\n'}]}]