A pile may go critical.Logical formLearned from2 sentences. A pile may reach critical mass.Logical formLearned from2 sentences. (Influence zone) of (aeration pipes) may be limited to a portion of a bottom half of a pile.Logical formLearned from2 sentences. Piles can be trapezoidal.Logical formLearned from2 sentences. Some piles may be built.Logical formLearned from2 sentences. A pile can be constituted-of-or-filled-with (coffee beans).Logical formLearned from2 sentences. Piles can be constituted-of-or-filled-with rope.Logical formLearned from2 sentences. A (junk pile) may pertain-to a male.Logical formLearned from2 sentences. A system can be constituted-of-or-filled-with some piles.Logical formLearned from2 sentences. Engineers may devise a system of some piles.Logical formLearned from2 sentences. A pile can be constituted-of-or-filled-with (tin cans).Logical formLearned from2 sentences. Clothings can be in a pile.Logical formLearned from2 sentences. Piles can be on a ledge.Logical formLearned from2 sentences. Piles can be constituted-of-or-filled-with condoms.Logical formLearned from2 sentences. Piles may pertain-to a us-state.Logical formLearned from2 sentences.