An option can be hard.Logical formLearned from36 sentences. A person may be tried hard.Logical formLearned from36 sentences. A matter can be constituted-of-or-filled-with hard work.Logical formLearned from36 sentences. A waiting can be hard.Logical formLearned from36 sentences. A quality can be hard.Logical formLearned from36 sentences. Pines can be hard.Logical formLearned from36 sentences. An enamel can be hard.Logical formLearned from36 sentences. Hard work may be involved.Logical formLearned from36 sentences. A task can be hard.Logical formLearned from36 sentences. A (bird flu virus) may remain hard.Logical formLearned from36 sentences. A person may wear a hard hat.Logical formLearned from36 sentences. An assessment can be hard.Logical formLearned from36 sentences. A package can be hard.Logical formLearned from36 sentences. A chance can be hard.Logical formLearned from36 sentences. A hard work may lie.Logical formLearned from35 sentences.