Complex sentence: In "Jack's Manual" (1910) there is another cocktail called The Alexander which is a mixture of rye whiskey and Bénédictine; it is unclear whether or not this has any relation to the cream-based version.
Split into simpler sentences: In "Jack's Manual" (1910) there is another cocktail called The Alexander which is a mixture of rye whiskey and Bénédictine. It is unclear whether or not this has any relation to the cream-based version.