A throwing can be hard.Logical formLearned from17 sentences. A stool can be hard.Logical formLearned from17 sentences. Studyings can be hard.Logical formLearned from17 sentences. Behavior can be hard.Logical formLearned from17 sentences. A spectrum can be hard.Logical formLearned from17 sentences. A scale can be hard.Logical formLearned from17 sentences. An extent can be hard.Logical formLearned from17 sentences. A hard work can be throughout a year.Logical formLearned from17 sentences. Learning can be hard.Logical formLearned from17 sentences. A video-game-console may have a hard drive.Logical formLearned from17 sentences. Innovation can be hard.Logical formLearned from17 sentences. Commitment can be to hard work.Logical formLearned from17 sentences. Hard drives can be used.Logical formLearned from17 sentences. A print can be hard.Logical formLearned from17 sentences. A (resource limit) can be hard.Logical formLearned from17 sentences.