Persons may sit on a rock.Logical formLearned from30 sentences. Rocks can be unstable.Logical formLearned from30 sentences. Rocks may move.Logical formLearned from30 sentences. A show can be at rocks.Logical formLearned from30 sentences. Layers can be constituted-of-or-filled-with sedimentary rocks.Logical formLearned from30 sentences. Boys may throw rocks.Logical formLearned from30 sentences. A person can be on a rock.Logical formLearned from30 sentences. Forms can be constituted-of-or-filled-with rock.Logical formLearned from30 sentences. A rock can be constituted-of-or-filled-with (crack cocaine).Logical formLearned from30 sentences. A female can be a rock.Logical formLearned from30 sentences. Rocks can be placed.Logical formLearned from30 sentences. A (rock group) may pertain-to a band.Logical formLearned from30 sentences. A rock can be shattered.Logical formLearned from30 sentences. A rock may be formed.Logical formLearned from30 sentences. Outcrops can be constituted-of-or-filled-with rocks.Logical formLearned from30 sentences.