Complex sentence: In 1987 the company started operating the television channel TF1 and in 1988 Bouygues moved into its new head office, the Challenger complex, in Saint-Quentin en Yvelines.
Split into simpler sentences: In 1987 the company started operating the television channel TF1. In 1988 Bouygues moved into its new head office, the Challenger complex, in Saint-Quentin en Yvelines.