Question: In which European mountain range will you find the mountains Grassen and Titlis both found between the cantons of Obwalden and Berne?
Sentence (from "Titlis"): The cable car system connects Engelberg (996 m ) to the summit of "Klein Titlis" (3028 m ) through the three stages of "Gerschnialp" (1262 m ), "Trübsee" (1796 m ) and "Stand" (2428 m ).
Relevant evidence: No