A crew may pertain-to a tu-154.Logical formLearned from13 sentences. Some crew may be held.Logical formLearned from13 sentences. A crew can be under pressure.Logical formLearned from13 sentences. A crew may fulfil an instruction.Logical formLearned from13 sentences. Some (crew members) can be in a country.Logical formLearned from13 sentences. A crew may install scientific equipment.Logical formLearned from13 sentences. An entry of a crew may bring a number of astronauts.Logical formLearned from13 sentences. (Crew members) can be unarmed.Logical formLearned from13 sentences. Power can be for a crew.Logical formLearned from13 sentences. A ransom can be for a crew.Logical formLearned from13 sentences. Recycling can be for a crew.Logical formLearned from13 sentences. Handling may pertain-to a crew.Logical formLearned from13 sentences. A crew may include a (replacement astronaut).Logical formLearned from13 sentences. Problems can be for crews.Logical formLearned from13 sentences. Persons may risk a crew.Logical formLearned from13 sentences.