Question: Han Seung-yeon and Leo, are singers of which nationality?
Sentence (from "Leo (singer)"): Jung Taek-woon (Hangul: 정택운 , born on November 10, 1990), better known by his stage name Leo (Hangul: 레오 ), is a South Korean singer, songwriter and musical theatre actor, signed under Jellyfish Entertainment.
Relevant evidence: Yes