A position can be plain.Logical formLearned from19 sentences. Intentions can be plain.Logical formLearned from19 sentences. Disks can be plain.Logical formLearned from19 sentences. A book can be plain.Logical formLearned from19 sentences. A rectangle can be plain.Logical formLearned from19 sentences. A livery can be plain.Logical formLearned from19 sentences. A hell can be plain.Logical formLearned from18 sentences. Flaps can be plain.Logical formLearned from18 sentences. A terrain can be plain.Logical formLearned from18 sentences. A square can be plain.Logical formLearned from18 sentences. A (truth magazine) can be plain.Logical formLearned from18 sentences. A gelatin can be plain.Logical formLearned from18 sentences. Buttons can be plain.Logical formLearned from18 sentences. Tubes can be plain.Logical formLearned from18 sentences. Duties can be plain.Logical formLearned from18 sentences.