Question: how many sims 4 expansion packs are there
[{'answer': 'three', 'provenance': [{'wikipedia_id': '37531003', 'title': 'The Sims 4', 'start_paragraph_id': 9, 'start_character': 18, 'end_paragraph_id': 9, 'end_character': 23, 'bleu_score': 1.0, 'section': 'Section::::Gameplay.:Create a Sim (CAS).\n'}]}]