Complex sentence: The excavations also uncovered large quantities of unopened mussels and oysters, echoing the finds of shell middens along the coast of Cúil Irra.
Split into simpler sentences: The excavations also uncovered large quantities of unopened mussels and oysters. Some of the tombs and nearby contained shells from shellfish, echoing the finds of shell middens along the coast of Cúil Irra.