Complex sentence: The long submarine cable to the Danish island of Laeso starts at Stensnaes and consists of 3 parallel cables, each consisting of two partial conductors with a copper cross section of 310 square millimeters.
Split into simpler sentences: The long submarine cable to the Danish island of Laeso starts at Stensnaes and consists of 3 parallel cables. Each of these cables has two copper conductors with a copper cross section of 310 square millimeters.