Upon the passing of Duke family heiress Mary Duke Biddle Trent Semans, UNC-TV will rebroadcast an episode of "Biographical Conversations with Mary Semans" this weekend.

Semans, a philanthropist and strong advocate of the arts, education and human rights in North Carolina, was 91 when she died yesterday. 

UNC-TV will show three consecutive one-hour interviews on Sunday starting at 6 p.m. In the interviews, conducted by UNC-TV's Shannon Vickery, Semans tells her life story in our own words, from intimate family stories to personal discussions of her own public and philanthropic career.