A person may buy off a shelf.Logical formLearned from60 sentences. Shelves can be in a country.Logical formLearned from58 sentences. A shelf can be fixed.Logical formLearned from58 sentences. An end may pertain-to a shelf.Logical formLearned from56 sentences. Portions may pertain-to a shelf.Logical formLearned from55 sentences. A book can be on a shelf.Logical formLearned from55 sentences. Some books can be on shelves.Logical formLearned from55 sentences. Shelves can be famous.Logical formLearned from54 sentences. A book can be on shelves.Logical formLearned from54 sentences. Shelves can be narrow.Logical formLearned from54 sentences. A shelf can be flat.Logical formLearned from54 sentences. Shelves can be endless.Logical formLearned from54 sentences. A continental shelf can be shallow.Logical formLearned from54 sentences. An (ice shelf specialist) can be at an university.Logical formLearned from52 sentences. A shelf can be removable.Logical formLearned from52 sentences.