Question: What was the name of the group in which one half of the duo Toheart debuted, the other being Woohyun from Infinite?
Sentence (from "Unihemispheric slow-wave sleep"): In USWS, also known as asymmetric slow-wave sleep, one half of the brain is in deep sleep, a form of non-rapid eye movement sleep and the eye corresponding to this half is closed while the other eye remains open.
Relevant evidence: No