Complex sentence: The SCO Group, on June 22,2005, released OpenServer 6.0, codenamed "Legend", which is the culmination of a multi-year multi-million dollar development effort and the first release in the new 6.0.x branch.
Split into simpler sentences: The SCO Group, on June 22,2005, released OpenServer 6.0, codenamed "Legend". It is the culmination of a multi-year multi-million dollar development effort and the first release in the new 6.0.x branch.