Simplify the following text for a Grade 10 native English-speaking person.
Original: Emiliano Zapata Salazar ( August 8 , 1879 -- April 10 , 1919 ) was a leading figure in the Mexican Revolution , which broke out in 1910 , and which was initially directed against the president Porfirio DÃ az .
Simplified: Emiliano Zapata Salazar ( August 8 , 1879 - April 10 , 1919 ) was a leader in the Mexican Revolution , which started in 1910 .