Question: Princess Cheonmyeong, was a princess of Silla, one of the Three Kingdoms of Korea, and is notable as the sister of Queen Seondeok of Silla, and reigned as Silla's which number ruler?
Sentence (from "Princess Cheonmyeong of Silla"): She was Queen Seondeok's full sister, her parents being King Jinpyeong and Queen Maya.
Relevant evidence: No