Complex sentence: It gave its name to the celtic "La Tène-Culture", during the late ironage the La Tène Culture developed in eastern France, Switzerland, Austria and southwest Germany it was the direct follower of the old ironage "Hallstatt-Culture".
Split into simpler sentences: It gave its name to the celtic "La Tène-Culture", during the late iron age the La Tène Culture developed in eastern France, Switzerland, Austria and southwest Germany. It was the direct follower of the old ironage "Hallstatt-Culture".