Complex sentence: He appeared in more than 120 films, 47 of which were great successes, and more than 30 of which alongside his brother, the actor and singer Pedro Infante, who died in an aviation accident in 1957.
Split into simpler sentences: He appeared in more than 120 films, 47 of which were great successes. In more than 30 films he appeared alongside his brother, the actor and singer Pedro Infante, who died in an aviation accident in 1957.