A side may slope_down from a ridge.Logical formLearned from2 sentences. Snow may go in a (ridge vent).Logical formLearned from2 sentences. A side may pertain-to a (ridge vent).Logical formLearned from2 sentences. A person may install a (ridge vent) with a (metal roof).Logical formLearned from2 sentences. A (ridge line) can be thin.Logical formLearned from2 sentences. A ridge can be open.Logical formLearned from2 sentences. An area can be constituted-of-or-filled-with (mountain ridges).Logical formLearned from2 sentences. (Mountain ridges) may reach some feet.Logical formLearned from2 sentences. A world can be constituted-of-or-filled-with ridges.Logical formLearned from2 sentences. (Ice ridges) can be constituted-of-or-filled-with liquid natural gas.Logical formLearned from2 sentences. (Ice ridges) can be dirty.Logical formLearned from2 sentences. Some ridges can be constituted-of-or-filled-with mountains.Logical formLearned from2 sentences. A tree can be on a ridge.Logical formLearned from2 sentences. A ridge may pertain-to a roof.Logical formLearned from2 sentences. (Ice ridges) can be basins.Logical formLearned from2 sentences.