Question: who is the character dirk diggler based on
[{'answer': 'American porn actor John Holmes', 'provenance': [{'wikipedia_id': '27595922', 'title': 'The Dirk Diggler Story', 'start_paragraph_id': 1, 'start_character': 209, 'end_paragraph_id': 1, 'end_character': 240, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '27595922', 'title': 'The Dirk Diggler Story', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 330, 'bleu_score': 0.9645876452711911, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7988747822920970478}, 'section': 'Section::::Abstract.'}]}]