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 "Ana-Maria Yanakieva"): She is also a scholar of Dimitar Berbatov Foundation.
Relevant evidence: Yes