Complex sentence: Immediately prior to its merger with the Canadian Alliance, it held only 15 of 301 seats in the Canadian House of Commons and never held more than 20 seats in Parliament between 1993 and 2003.
Split into simpler sentences: Immediately prior to its merger with the Canadian Alliance, it held only 15 of 301 seats in the Canadian House of Commons. The party never held more than 20 seats in Parliament between 1993 and 2003.