Question: When is the composer of film Mangala Nayagi 's birthday?
Sentence (from "V. Kumar"): V. Kumar  (28 July 1934 - 7 January 1996) was a yesteryear Tamil cinema music director, born in Chennai, Tamilnadu on 28 July 1934 to Varadharajulu and Dhanabhakiyam couple, in July 1969 he married a Tamil cinema playback singer Swarna and had a son Suresh.
Relevant evidence: Yes