Question: sports betting is only legal in four states of the u.s. they are
[{'answer': 'Nevada', 'provenance': [{'wikipedia_id': '1328050', 'title': 'Sports betting', 'start_paragraph_id': 2, 'start_character': 524, 'end_paragraph_id': 2, 'end_character': 530, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Oregon', 'provenance': [{'wikipedia_id': '1328050', 'title': 'Sports betting', 'start_paragraph_id': 47, 'start_character': 249, 'end_paragraph_id': 47, 'end_character': 255, 'bleu_score': 1.0, 'section': 'Section::::Legality.:United States.:1970s–2018: Prohibition on sports betting.\n'}]}, {'answer': 'Delaware', 'provenance': [{'wikipedia_id': '1328050', 'title': 'Sports betting', 'start_paragraph_id': 47, 'start_character': 218, 'end_paragraph_id': 47, 'end_character': 226, 'bleu_score': 1.0, 'section': 'Section::::Legality.:United States.:1970s–2018: Prohibition on sports betting.\n'}]}, {'answer': 'Montana', 'provenance': [{'wikipedia_id': '1328050', 'title': 'Sports betting', 'start_paragraph_id': 47, 'start_character': 228, 'end_paragraph_id': 47, 'end_character': 235, 'bleu_score': 1.0, 'section': 'Section::::Legality.:United States.:1970s–2018: Prohibition on sports betting.\n'}]}]