Question: What nationality is Folarin Ogunsola, a swimmer who competes for the smallest nation in mainland Africa?
Sentence (from "Bahrain"): Bahrain ( ; Arabic: البحرين‎ ‎   ), officially the Kingdom of Bahrain (Arabic: مملكة البحرين‎ ‎ "  "), is a small Arab constitutional monarchy in the Persian Gulf.
Relevant evidence: No