(LEAD) S. Korean Paralympic medal contender finishes 5th in biathlon
(ATTN: ADDS quotes, info in paras 6-7)
By Joo Kyung-don
PYEONGCHANG, South Korea, March 10 (Yonhap) -- South Korea's Nordic para skier Sin Eui-hyun finished fifth in the men's 7.5-kilometer sitting biathlon event at the PyeongChang Winter Paralympic