Jeongseon Lee clan
was originally born as a third son in Lý dynasty , Vietnam when Lý Nhân Tông , 4th emperor , ruled . 
<triplet> Lý dynasty <subj> Vietnam <obj> located in present-day administrative territorial entity <triplet> Lý Nhân Tông <subj> Lý dynasty <obj> family <subj> Vietnam <obj> country of citizenship