A basis may pertain-to a convention.Logical formLearned from26 sentences. A convention can be in a city.Logical formLearned from26 sentences. A convention may be signed by some countries.Logical formLearned from26 sentences. An attendance can be at some convention.Logical formLearned from26 sentences. A weekend can be between conventions.Logical formLearned from26 sentences. Stars may pertain-to a convention.Logical formLearned from26 sentences. A convention may be cancelled.Logical formLearned from26 sentences. Organizers may pertain-to a convention.Logical formLearned from26 sentences. Thousands of (convention delegates) may stand.Logical formLearned from26 sentences. A view may show a convention.Logical formLearned from26 sentences. A presidential candidate can be at a convention.Logical formLearned from26 sentences. Some days can be before a convention.Logical formLearned from26 sentences. A talk may pertain-to a convention.Logical formLearned from26 sentences. (Law enforcement activities) can be during a convention.Logical formLearned from26 sentences. A male may be introduced at a convention.Logical formLearned from26 sentences.