Question: who has won the most afc west titles
[{'answer': 'Denver Broncos', 'provenance': [{'wikipedia_id': '1952071', 'title': 'AFC West', 'start_paragraph_id': 1, 'start_character': 201, 'end_paragraph_id': 1, 'end_character': 215, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Oakland Raiders', 'provenance': [{'wikipedia_id': '1952071', 'title': 'AFC West', 'start_paragraph_id': 1, 'start_character': 263, 'end_paragraph_id': 1, 'end_character': 278, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Los Angeles Chargers', 'provenance': [{'wikipedia_id': '1952071', 'title': 'AFC West', 'start_paragraph_id': 1, 'start_character': 217, 'end_paragraph_id': 1, 'end_character': 237, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]