Complex sentence: Excavations on the site in 2009 found eight 1,400-year-old skeletons in a burial ground could be German mercenaries hired by wealthy land owners to protect their property.
Split into simpler sentences: Excavations on the site in 2009 found eight 1,400-year-old skeletons in a burial ground. They could be German mercenaries hired by wealthy land owners to protect their property.