A burden may pertain-to a butterfly.Logical formLearned from19 sentences. A burden can be on a life.Logical formLearned from19 sentences. A (debt burden) may pertain-to a male.Logical formLearned from19 sentences. A burden can be perpetual.Logical formLearned from19 sentences. A person may have burdens.Logical formLearned from19 sentences. A burden can be on a user.Logical formLearned from19 sentences. Life may become a burden.Logical formLearned from19 sentences. A sense can be constituted-of-or-filled-with burden.Logical formLearned from19 sentences. A burden may fall on a male.Logical formLearned from19 sentences. A burden may pertain-to years.Logical formLearned from19 sentences. A burden may pertain-to states.Logical formLearned from19 sentences. An undue burden can be on interstate commerce.Logical formLearned from19 sentences. A burden can be on users.Logical formLearned from19 sentences. A burden can be on employees.Logical formLearned from19 sentences. A burden may pertain-to presence.Logical formLearned from19 sentences.