Read the text and determine if the sentence is true:

Leonard Simon Nimoy ( ; March 26, 1931 February 27, 2015) was an American actor, film director, photographer, author, singer and songwriter. He was best known for his role as Spock of the "Star Trek" franchise, a character he portrayed in television and film from shot in late 1964 to his final film performance in 2013.

Sentence: Leonard Simon Nimoy's favorite role was Spock.
It's impossible to say