user: Question: Which elevation groundstation has a capacity in persons/hour larger than 820, and a Name or route of lager 1, and a slope length smaller than 336?
Columns: ['Name or route', 'type', 'elevation groundstation', 'elevation mountainstation', 'slope length', 'capacity in persons/hour', 'construction year(s)']
Types: ['text', 'text', 'real', 'real', 'real', 'real', 'text']
Sample row: ['Betten Betten Village', 'aerial tramway', 832.0, 1199.0, 872.0, 350.0, '1950 1965']
SQL:

assistant: SELECT "elevation groundstation" FROM "Table" WHERE "capacity in persons/hour" > 820.0 AND "Name or route" = 'lager 1' AND "slope length" < 336.0;