Complex sentence: He was the announcer for DuMont Television Network's TV talent show Doorway to Fame in 1947, but he left Dumont and for WPIX on May 15,1948 to be a news announcer and weatherman.
Split into simpler sentences: He was the announcer for DuMont Television Network's TV talent show Doorway to Fame in 1947. He left Dumont and for WPIX on May 15,1948 to be an announcer and weatherman.