Complex sentence: On the night of December 8,1980, Mark David Chapman shot Lennon in the Dakota's 72nd Street entryway as the singer was returning home from a recording session, and he was pronounced dead upon arrival at nearby Roosevelt Hospital.
Split into simpler sentences: On the night of December 8,1980, Mark David Chapman shot Lennon in the Dakota's 72nd Street entryway as the singer was returning home from a recording session. Lennon was pronounced dead upon arrival at nearby Roosevelt Hospital.