A defense may pertain-to a hill.Logical formLearned from6 sentences. A hill can be to the west of a town.Logical formLearned from6 sentences. A pass can be between some hills.Logical formLearned from6 sentences. A length may pertain-to hills.Logical formLearned from6 sentences. A group can be constituted-of-or-filled-with (rock hills).Logical formLearned from6 sentences. A (rock hill) can be bare.Logical formLearned from6 sentences. Access can be to a hill.Logical formLearned from6 sentences. Presence may pertain-to hills.Logical formLearned from6 sentences. A hill can be important.Logical formLearned from6 sentences. A hill may include a (summit plateau).Logical formLearned from6 sentences. A hill may be composed of sandstones.Logical formLearned from6 sentences. A part of a hill may be formed from a (pennant sandstone).Logical formLearned from6 sentences. Flanks of a hill may owe a steepness to an action of glacial ice.Logical formLearned from6 sentences. Images may pertain-to hills.Logical formLearned from6 sentences. Hills can be dominant.Logical formLearned from6 sentences.