Question: who is the actor that plays howard on big bang theory
[{'answer': 'Simon Maxwell Helberg', 'provenance': [{'wikipedia_id': '4789624', 'title': 'Simon Helberg', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 21, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '4789624', 'title': 'Simon Helberg', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 439, 'bleu_score': 0.840329742092178, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11605513680767000458}, 'section': 'Section::::Abstract.'}]}]