Complex sentence: RTBF Eurosport 21 ceased transmission on February 1999, when a contract between RTBF and Eurosport was broken and caused all sports content to be broadcast on both free-to-air channels, La Une and La Deux.
Split into simpler sentences: RTBF Eurosport 21 ceased transmission on February 1999, when a contract between RTBF and Eurosport was broken. Making all sports content to air on both free-to-air channels, La Une and La Deux.