Question: who plays the rock's girlfriend on ballers
[{'answer': 'Arielle Kebbel', 'provenance': [{'wikipedia_id': '42710185', 'title': 'Ballers', 'start_paragraph_id': 12, 'start_character': 12, 'end_paragraph_id': 12, 'end_character': 26, 'bleu_score': 1.0, 'section': 'Section::::Cast and characters.:Main.\n'}]}]