A serve can be hard.Logical formLearned from93 sentences. A tournament can be on hard courts.Logical formLearned from93 sentences. An aground can be hard.Logical formLearned from93 sentences. Weeks can be hard.Logical formLearned from93 sentences. A tone can be hard.Logical formLearned from93 sentences. A childhood can be hard.Logical formLearned from92 sentences. A hard work can be old-fashioned.Logical formLearned from92 sentences. Some years can be with hard labor.Logical formLearned from91 sentences. A (drive space) can be hard.Logical formLearned from91 sentences. A session can be hard.Logical formLearned from91 sentences. A bump can be hard.Logical formLearned from91 sentences. A version can be hard.Logical formLearned from90 sentences. A floor can be hard.Logical formLearned from90 sentences. A step can be hard.Logical formLearned from90 sentences. A hard drive can be full.Logical formLearned from90 sentences.