Complex sentence: Cobain wanted to start work on the album in the summer of 1992, but the band was unable as Cobain and his bandmates lived in different cities, and the singer and his wife Courtney Love were expecting the birth of their daughter Frances Bean.
Split into simpler sentences: Cobain wanted to start work on the album in the summer of 1992. However, the band was unable to since Cobain and his bandmates lived in different cities, and the singer and his wife Courtney Love were expecting the birth of their daughter Frances Bean.