Complex sentence: All were killed, as well as a woman by the name of Martha Hawden on the ground, working in a house at 1324 Third Avenue North East, belonging to Gordon and Betty Hume, which was completely destroyed when the airliner crashed into it.
Split into simpler sentences: All were killed, as well as a woman by the name of Martha Hawden on the ground. She worked in a house at 1324 Third Avenue North East, belonging to Gordon and Betty Hume, which was completely destroyed when the airliner crashed into it.