Question: When was the retired Indian track and field athlete coached by O. M. Nambiar born? 

Related documents: [0]  [DOC] Pilavullakandi Thekkeparambil Usha (born 27 June 1964), popularly known as P. T. Usha, is a retired Indian track and field athlete. She has been associated with Indian athletics since 1979. She is often called the "queen of Indian track and field". She is nicknamed as the Payyoli Express. Currently she runs the Usha School of Athletics at Koyilandy in Kerala. [END] 
[1]  [DOC] O. M. Nambiar (born 1932) is an Indian athletics coach who was awarded Dronacharya award in 1985. He coached the well known Indian athlete P. T. Usha. He hails from Kerala state. [END]  
Answer: 27 June 1964
27 June 1964