Complex sentence: In the late 1960s, the Baqaians started a private sector hospital in Nazimabad, Karachi, the Baqai Hospital Nazimabad, which became a general hospital with 350 beds and modern facilities aimed at middle-income private patients, also doing charitable work.
Split into simpler sentences: In the late 1960s, the Baqaians started a private sector hospital in Nazimabad, Karachi: the Baqai Hospital Nazimabad. It which became a general hospital with 350 beds and modern facilities aimed at middle-income private patients, also doing charitable work.