Complex sentence: The Helliniko Olympic Complex is situated on the east coast of Greece south of Athens, approximately 30 kilometres from the Olympic Village, and was built for the staging of the 2004 Summer Olympics and consists of 5 separate venues.
Split into simpler sentences: The Helliniko Olympic Complex is situated on the east coast of Greece south of Athens, approximately 30 kilometres from the Olympic Village. It was built for the staging of the 2004 Summer Olympics and consists of 5 separate venues.