Complex sentence: Under Hinman's leadership, the Alberta Alliance and the upstart Wildrose Party of Alberta merged to unite the right wing of the political spectrum in Alberta at a convention held on January 19,2008 in Calgary.
Split into simpler sentences: Under Hinman's leadership, the Alberta Alliance and the upstart Wildrose Party of Alberta decided to hold a merger meeting to unite the right wing political spectrum in Alberta. Members of the two parties met and merged at a convention held on January 19,2008 in Calgary.