when was he born ?
2 August 1876
Pingali Venkayya
Pingali Venkayya (2 August 1876 – 4 July 1963) was an Indian freedom fighter and the 
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wiki:7425453
Pingali Venkayya [SEP] Introduction
Pingali Venkayya (2 August 1876 – 4 July 1963) was an Indian freedom fighter and the designer of the flag on which the Indian national flag was based. He was born at Bhatlapenumarru, near Machilipatnam, in what is now the Indian state of Andhra Pradesh. Various so-called national flags had been used by members of the Indian independence movement prior to independence being achieved in 1947. Venkayya's version was first designed for the Indian National Congress and subsequently modified in 1947. According to "The Hindu", "Pingali Venkayya was an authority in geology, agriculture and also an educationist who set up an educational institution in Machilipatnam.