In fact, it is through studying the objects in ancient heathen tombs that archaeologists get most of their information on ancient people and their customs.
(it; is; through studying the objects in ancient heathen tombs) (archaeologists; get; most of their information on ancient people and their customs; L:ancient heathen tombs)
it archaeologists
is get
through studying the objects in ancient heathen tombs
most of their information on ancient people and their customs L:ancient heathen tombs