When was the person who was taught how to play the helicopter shot by Santosh Lal born?
Santosh Lal: Santosh Lal (4 December 1983 – 17 July 2013) was an Indian cricketer. Santosh Lal:  He taught MS Dhoni how to play the helicopter shot. MS Dhoni: Mahendra Singh Dhoni (   ; commonly known as MS Dhoni; born 7 July 1981) is an Indian cricketer who captained the Indian team in limited-overs formats from 11th of September 2007 to 4th of January 2017 and in Test cricket from 2008 to 28th of December 2014.
7 July 1981