Complex sentence: However, over time more examples were found, not only in Ireland and Britain, but also along the Atlantic seaboard of the European continent and it became clear from their style, technology and context that they belonged to the Bronze Age.
Split into simpler sentences: However, over time more examples were found, not only in Ireland and Britain, but also along the Atlantic seaboard of the European continent. It became clear from their style, technology and context that they belonged to the Bronze Age.