Question: How many National Film Awards did this Indian film actor, director, screenwriter, producer, playback singer and lyricist who appeared in Apoorva Raagangal win?
Sentence (from "K. S. L. Swamy"): His other films such as "Gandhinagara" (1968) and "Bhagya Jyothi" (1975) and "Malaya Marutha" (1986) proved successful.
Relevant evidence: No