Complex sentence: The longest drought among teams who have won their league title but never the Memorial Cup belongs to the Brandon Wheat Kings, who have won three WHL titles but never the Memorial Cup since their founding in 1968.
Split into simpler sentences: The longest drought among teams who have won their league title but never the Memorial Cup belongs to the Brandon Wheat Kings. The team has won three WHL titles but never the Memorial Cup since their founding in 1968.