Question: This South Korean television series that premiere on July 17, 2017 stars a singer and actress who is a member of what girl group?
Sentence (from "Seohyun"): Apart from her group's activities, she has established herself as an actress, notably through her participation in the original and Korean versions of stage musicals including "Moon Embracing the Sun", "Gone with the Wind" and "Mamma Mia".
Relevant evidence: No