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?
Sentence (from "ACB Most Valuable Player Award"): Since then, four players have won the award more than once: Darryl Middleton (3-time winner), Arvydas Sabonis, Tanoka Beard, and Luis Scola (2-time winners).
Relevant evidence: No