Question: who was golden states coach before steve kerr
[{'answer': 'Mark Jackson', 'provenance': [{'wikipedia_id': '72891', 'title': 'Golden State Warriors', 'start_paragraph_id': 46, 'start_character': 1138, 'end_paragraph_id': 46, 'end_character': 1150, 'bleu_score': 1.0, 'section': 'Section::::Franchise history.:2009–present: The Stephen Curry era.:2009–2012: Continued struggles and good draft choices.\n'}]}]