Complex sentence: A Swiss version of Nick for German-speaking viewers began on April 1,2009, first sharing time with a Swiss version of VIVA, then (from May 16,2011 onwards) with a new localised Swiss version of Comedy Central.
Split into simpler sentences: A Swiss version of Nickelodeon for German-speaking viewers began on April 1,2009, first sharing time with a Swiss version of VIVA. Then (from May 16,2011 onwards) with a new localised Swiss version of Comedy Central.