Workers may undergo a survey.Logical formLearned from132 sentences. Workers can be at plants.Logical formLearned from131 sentences. Issues may affect workers.Logical formLearned from131 sentences. A crowd can be constituted-of-or-filled-with workers.Logical formLearned from131 sentences. Some workers can be in a country.Logical formLearned from131 sentences. Workers may demand wages.Logical formLearned from131 sentences. Workers may begin.Logical formLearned from130 sentences. (Rescue workers) may continue a search.Logical formLearned from130 sentences. Workers may fear that something-is-the-case.Logical formLearned from130 sentences. Some (aid workers) may be held.Logical formLearned from130 sentences. A (worker productivity) may pertain-to a country.Logical formLearned from130 sentences. Some (aid workers) may be killed.Logical formLearned from129 sentences. (Farm workers) can be landless.Logical formLearned from129 sentences. An union may represent workers.Logical formLearned from129 sentences. Workers can be high.Logical formLearned from129 sentences.