Complex sentence: On 14 September 2009, it was revealed that the international arm of CBS struck a joint venture deal with Chellomedia to launch Six CBS-branded channels in the UK during 2009.
Split into simpler sentences: On 14 September 2009, it was revealed that the international arm of CBS struck a joint venture deal with Chellomedia. To launch Six CBS-branded channels in the UK during 2009.