A US-president may vow at an inauguration.Logical formLearned from5 sentences. A (police chief) may vow that something-is-the-case.Logical formLearned from5 sentences. A president may vow before a nation.Logical formLearned from5 sentences. A prince may vow that something-is-the-case.Logical formLearned from5 sentences. A male may vow during a (re-election campaign).Logical formLearned from5 sentences. A person may vow changes.Logical formLearned from5 sentences. Aides of a firebrand may vow that something-is-the-case.Logical formLearned from5 sentences. A male may vow in a weekly (radio address).Logical formLearned from5 sentences. Palestinian prime minister may vow at a summit.Logical formLearned from5 sentences. A regime may vow a surrender.Logical formLearned from5 sentences. A country may vow a surrender.Logical formLearned from5 sentences. An (oil ministry official) may vow that something-is-the-case.Logical formLearned from5 sentences. A male may vow in a (press conference).Logical formLearned from5 sentences. Organisers may vow that something-is-the-case.Logical formLearned from5 sentences. A son may vow that something-is-the-case.Logical formLearned from5 sentences.