Question: In what year did the boy group led by Kang Seung-yoon debut?
Sentence (from "Ma Chao"): Ma Chao took shelter under Zhang Lu for a while until around 214, when he heard that the warlord Liu Bei was fighting for control over Yi Province (covering present-day Sichuan and Chongqing) with Yi Province's governor, Liu Zhang.
Relevant evidence: No