On March 6, 1971, a group of women marched from Boston Common through the city and into Cambridge in celebration and demonstration of International Women’s Day. Then they took a detour and filed into 888 Memorial Drive, where they stayed for 10 days. The occupation and the greater context of the takeover are documented in “Left on Pearl,” a short film by the 888 Women’s History Project in Cambridge. Guests: Rochelle Ruthchild, executive producer of the film and one of the occupiers of 888 Memorial Drive in 1971; Susie Rivo, director of “Left on Pearl"; and Cheryl Stein, executive producer of “Left on Pearl.”