Question: when did the first pair of yeezys come out
[{'answer': 'February 14 , 2015', 'provenance': [{'wikipedia_id': '48613465', 'title': 'Adidas Yeezy', 'start_paragraph_id': 9, 'start_character': 392, 'end_paragraph_id': 9, 'end_character': 410, 'bleu_score': 1.0, 'section': 'Section::::Footwear.:Yeezy Boost 750.\n'}]}, {'provenance': [{'wikipedia_id': '48613465', 'title': 'Adidas Yeezy', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 548, 'bleu_score': 0.679499123438239, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7298827622153666744}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '48613465', 'title': 'Adidas Yeezy', 'section': 'Section::::Footwear.:Yeezy Boost 750.\n', 'start_paragraph_id': 9, 'end_paragraph_id': 9, 'meta': {'evidence_span': ['The Yeezy boost 750 "Light Brown" was initially released on February 14, 2015, exclusively for those who confirmed a reservation through the Adidas mobile app. This initial release of the Adidas Yeezy Boost 750 "Light Brown" was limited to 9000 pairs to be available only in New York City via the Adidas smartphone app; the Adidas Yeezy Boosts were sold out within 10 minutes. Between February 21 and February 28 the Yeezy Boost 750 "Light Brown" was available through a wider range of retailers and boutiques.', 'On December 3, 2013, Adidas confirmed a new shoe collaboration deal with West. On February 8, 2015, the name and design for the Kanye West and Adidas collaboration shoe was revealed,', 'The Yeezy boost 750 "Light Brown" was initially released on February 14, 2015, exclusively for those who confirmed a reservation through the Adidas mobile app.']}}]}]