Simplify the following text for a Grade 10 native English-speaking person.
Original: William Stanley Vann FRCO , ARCM ( 15 February 1910 â `` 27 March 2010 ) was an English composer , organist , choral conductor , and choir trainer , primarily in the Anglican cathedral tradition .
Simplified: Stanley Vann ( born Leicester , 15 February 1910 - 27 March 2010 ) was an English composer , organist , choral conductor , and choir trainer .