Exchange may vow mid-flight.Logical formLearned from4 sentences. A US-president may vow a focus.Logical formLearned from4 sentences. A president may vow an effort.Logical formLearned from4 sentences. Extremists may vow retaliation.Logical formLearned from4 sentences. An (opposition leader) may vow protests.Logical formLearned from4 sentences. A government may vow a line.Logical formLearned from4 sentences. A US-president may vow justice.Logical formLearned from4 sentences. A president may be vowed at an un.Logical formLearned from4 sentences. A spokesman may vow revenge.Logical formLearned from4 sentences. (Air force commander) may vow that something-is-the-case.Logical formLearned from4 sentences. A US-president may vow help to (battle disease).Logical formLearned from4 sentences. A country may vow success.Logical formLearned from4 sentences. A president may vow a focus.Logical formLearned from4 sentences. A US-president may vow a program of repairs to roads.Logical formLearned from4 sentences. A leader may vow in a speech.Logical formLearned from4 sentences.