Weeks can be fruitless.Logical formLearned from22 sentences. Deeds can be fruitless.Logical formLearned from21 sentences. A quest can be fruitless.Logical formLearned from21 sentences. Struggles can be fruitless.Logical formLearned from21 sentences. Debates can be fruitless.Logical formLearned from21 sentences. A siege can be fruitless.Logical formLearned from21 sentences. A (job search) can be fruitless.Logical formLearned from20 sentences. Trips can be fruitless.Logical formLearned from20 sentences. Attacks can be fruitless.Logical formLearned from19 sentences. A labor can be fruitless.Logical formLearned from19 sentences. A journey can be fruitless.Logical formLearned from19 sentences. An effort may prove fruitless.Logical formLearned from19 sentences. Some attempts may prove fruitless.Logical formLearned from18 sentences. An attack can be fruitless.Logical formLearned from18 sentences. A dialogue can be fruitless.Logical formLearned from18 sentences.