This is the 18724th most frequent Korean word.
신진서
"신진서" is a Korean professional Go (Baduk) player.
Here, "신진서" is used as a person's name, referencing Shin Jin-seo, a well-known Go player.
신진서는 뛰어난 바둑 기사이다.
Shin Jin-seo is an outstanding Go player.
The word "신진서" refers to the person's name again, highlighting his involvement in a Go match.
오늘 신진서의 경기를 보며 감동을 받았다.
Today, I watched Shin Jin-seo's match and was moved.
"신진서" serves as an exemplar or role model in the realm of playing Go in this sentence.