Question: who has been nominated the most times for best actor
[{'answer': 'Spencer Tracy', 'provenance': [{'wikipedia_id': '43842610', 'title': 'List of actors with two or more Academy Award nominations in acting categories', 'start_paragraph_id': 2, 'start_character': 337, 'end_paragraph_id': 2, 'end_character': 350, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Laurence Olivier', 'provenance': [{'wikipedia_id': '43842610', 'title': 'List of actors with two or more Academy Award nominations in acting categories', 'start_paragraph_id': 2, 'start_character': 355, 'end_paragraph_id': 2, 'end_character': 371, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '43842610', 'title': 'List of actors with two or more Academy Award nominations in acting categories', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 952, 'bleu_score': 0.9559985051366491, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14329914890008361733}, 'section': 'Section::::Abstract.'}]}]