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?
{'answer': 'goalscorer', 'supporting_facts': [['Ana-Maria Yanakieva', 0], ['Ana-Maria Yanakieva', 1], ['Dimitar Berbatov', 0], ['Dimitar Berbatov', 1]]}