(Ice crystals) can be sharp.Logical formLearned from8 sentences. Crystals can be constituted-of-or-filled-with (semiconductor materials).Logical formLearned from8 sentences. Crystals can be constituted-of-or-filled-with methane.Logical formLearned from8 sentences. Crystals can be constituted-of-or-filled-with materials.Logical formLearned from8 sentences. Conjunction can be with (crystal methamphetamine).Logical formLearned from8 sentences. Crystals can be constituted-of-or-filled-with sugar.Logical formLearned from8 sentences. Crystals can be biological.Logical formLearned from8 sentences. A color may pertain-to a crystal.Logical formLearned from8 sentences. Molecules can be in a crystal.Logical formLearned from8 sentences. Crystals can be constituted-of-or-filled-with frozen water.Logical formLearned from8 sentences. A crystal can be inorganic.Logical formLearned from8 sentences. Light can be in crystals.Logical formLearned from8 sentences. Crystals can be constituted-of-or-filled-with silica.Logical formLearned from8 sentences. Crystals can be asymmetric.Logical formLearned from8 sentences. Ends may pertain-to a crystal.Logical formLearned from8 sentences.