Question: when does it start warming up in houston
[{'answer': 'March 20'}, {'provenance': [{'wikipedia_id': '8744197', 'title': 'Climate of Houston', 'start_paragraph_id': 14, 'start_character': 0, 'end_paragraph_id': 14, 'end_character': 421, 'bleu_score': 0.636635263976132, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6398964094222597614}, 'section': 'Section::::Seasonal observation.:Spring.\n'}]}]