A vigil can be vain.Logical formLearned from4 sentences. Efforts can be vain.Logical formLearned from4 sentences. Some votes may be declared vain.Logical formLearned from3 sentences. Efforts may prove vain.Logical formLearned from3 sentences. A need can be vain.Logical formLearned from3 sentences. Negotiations can be vain.Logical formLearned from3 sentences. A father can be vain.Logical formLearned from3 sentences. An insect can be vain.Logical formLearned from3 sentences. A butterfly can be vain.Logical formLearned from3 sentences. A reference can be vain.Logical formLearned from3 sentences. Songs can be vain.Logical formLearned from3 sentences. An agony can be vain.Logical formLearned from3 sentences. Lights can be vain.Logical formLearned from3 sentences. A professor can be vain.Logical formLearned from3 sentences. A family can be vain.Logical formLearned from3 sentences.