Complex sentence: Bush became American television's first African-American female weather anchor of primetime news in 1975 at WGPR-TV, the world's first black-owned-and-operated television station.
Split into simpler sentences: Bush became American television's first African-American female weather anchor of primetime news in 1975. The station for which she anchored, WGPR-TV, was the world's first black-owned-and-operated television station.