Exchange can be for a hostage.Logical formLearned from39 sentences. An exchange may pertain-to prisoners.Logical formLearned from39 sentences. Rubles may undergo an (exchange rate).Logical formLearned from39 sentences. An agreement can be on exchanges.Logical formLearned from39 sentences. Exchange can be for catcher.Logical formLearned from39 sentences. A (stock exchange) may pertain-to persons.Logical formLearned from39 sentences. Advantage may pertain-to an (exchange rate).Logical formLearned from39 sentences. An opportunity can be for an exchange of views.Logical formLearned from39 sentences. Members may pertain-to an exchange.Logical formLearned from39 sentences. An (exchange rate) may fluctuate.Logical formLearned from39 sentences. An exchange can be secret.Logical formLearned from39 sentences. (Exchange programs) can be for students.Logical formLearned from39 sentences. Messages may undergo exchanges.Logical formLearned from39 sentences. Exchange can be for a check.Logical formLearned from39 sentences. Exchange can be for sums of money.Logical formLearned from39 sentences.