A sound can be tough.Logical formLearned from14 sentences. An (enforcement action) can be tough.Logical formLearned from14 sentences. A load can be tough.Logical formLearned from14 sentences. Talkers can be tough.Logical formLearned from14 sentences. A bar can be tough.Logical formLearned from14 sentences. Phlegms can be tough.Logical formLearned from14 sentences. Scales can be tough.Logical formLearned from14 sentences. An example can be tough.Logical formLearned from14 sentences. A demeanour can be tough.Logical formLearned from14 sentences. A (television ad) can be tough.Logical formLearned from14 sentences. Relations can be tough.Logical formLearned from14 sentences. A dough can be tough.Logical formLearned from14 sentences. A last one can be tough.Logical formLearned from14 sentences. A county can be tough on drugs.Logical formLearned from14 sentences. A brother can be tough.Logical formLearned from14 sentences.