Complex sentence: Hammer saves a couple of archaeologists from unknown muggers in New York, Al Qaeda agents who believe they possess a thigh bone of the Biblical character, Goliath.
Split into simpler sentences: Hammer saves a couple of archaeologists from unknown muggers somewhere in New York. Lo and behold, the archaeologists are the target of Al Qaeda agents who believe they possess a thigh bone that belonged to the Biblical character, Goliath.