What event did the adament supporter of a leading figure of the Mexican Revolution and main leader of the peasant revolution in the state of Morelos witness when he was seven years old?
Ralph Chaplin: Ralph Hosea Chaplin (1887–1961) was an American writer, artist and labor activist. Ralph Chaplin:  At the age of seven, he saw a worker shot dead during the Pullman Strike in Chicago, Illinois. Ralph Chaplin:  During a time in Mexico he was influenced by hearing of the execution squads established by Porfirio Díaz, and became a supporter of Emiliano Zapata. Emiliano Zapata: Emiliano Zapata Salazar (] ; 8 August 1879 – 10 April 1919) was a leading figure in the Mexican Revolution, the main leader of the peasant revolution in the state of Morelos, and the inspiration of the agrarian movement called "Zapatismo".
a worker shot dead