Question: when did the buffalo sabres join the nhl
[{'answer': 'the 1970 -- 71 season'}, {'provenance': [{'wikipedia_id': '69918', 'title': 'Buffalo Sabres', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 842, 'bleu_score': 0.943595104031627, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14096046158607462194}, 'section': 'Section::::History.:Early years and the French Connection (1970–1981).\n'}]}]