Question: The Lötschenlücke connects the Lötschental to the valley of a glacier with a length of about what in 2014?
Sentence (from "Aletsch Glacier"): The Aletsch Glacier (German: "Aletschgletscher" ) or Great Aletsch Glacier ("Grosser Aletschgletscher ") is the largest glacier in the Alps.
Relevant evidence: Yes