Natalia Trefilova
Natalia competed at the 1988 Summer Olympic Games in Seoul , Korea , in the 100 , 200 , 400 , & 800 metre freestyles , & the 4 x 100 metre freestyle relay . 
<triplet> 1988 Summer Olympic Games <subj> 1988 <obj> point in time <subj> 100, 200, 400, & 800 metre freestyles, & the 4 x 100 metre freestyle relay. <obj> has part <triplet> 100, 200, 400, & 800 metre freestyles, & the 4 x 100 metre freestyle relay. <subj> 1988 Summer Olympic Games <obj> part of