Question: What is the date of death of Yuan-Pern Lee's father?
Sentence (from "Yuan-Tsong Chen"): He is the director emeritus( 2001 – 2010) and distinguished research fellow( 2001 – present) of the Institute of Biomedical Sciences, Academia Sinica, Taiwan, and also tenured professor of pediatrics of Duke University( 1993 – present)
Relevant evidence: No