Everybody may scratch heads.Logical formLearned from24 sentences. A cd may be scratched.Logical formLearned from23 sentences. A male may scratch a chin.Logical formLearned from23 sentences. Observers may scratch heads.Logical formLearned from23 sentences. A little red hen may be scratched about a barnyard.Logical formLearned from22 sentences. A doctor may be scratched.Logical formLearned from21 sentences. A person may scratch an itch.Logical formLearned from21 sentences. A person may find scratch a head him-or-herself.Logical formLearned from21 sentences. A disc may be scratched.Logical formLearned from21 sentences. Some head may scratch.Logical formLearned from21 sentences. A person may scratch ears.Logical formLearned from20 sentences. Persons may scratch a head.Logical formLearned from20 sentences. A man may be scratched.Logical formLearned from20 sentences. A person may scratch a chin.Logical formLearned from20 sentences. A male may scratch at an age.Logical formLearned from20 sentences.