Question: What is the nationality of a basketball player who competed in the 1988 Summer Olympics and won the ACB Finals Most Valuable Player Award twice?
{'answer': 'Lithuanian', 'supporting_facts': [['ACB Finals Most Valuable Player Award', 0], ['ACB Finals Most Valuable Player Award', 2], ['Arvydas Sabonis', 0], ['Arvydas Sabonis', 3]]}