Question: Abar Bochhor Tirish Pore was organized in part in memory of an Indian Bengali singer, songwriter, bassist, and composer, who co-founded what progressive rock band?
Sentence (from "Gautam Chattopadhyay"): Gautam Chattopadhyay (1 June 1948 – 20 June 1999) was an Indian Bengali singer, songwriter, bassist, and composer.
Relevant evidence: Yes