Question: For which accomplishment in Bulgarian football is the professional footballer who plays for Indian Super League club Kerala Blasters, and whose name is used for the Foundation where Ana-Maria Yanakieva, a singer from the music label Virginia Records was a scholar, considered the all-time leader?
Sentence (from "Kerala Blasters FC"): Kerala Blasters Football Club is an Indian professional football club based in Kochi, Kerala.
Relevant evidence: No