A person can be at a summit.Logical formLearned from150 sentences. Presence can be at a summit.Logical formLearned from150 sentences. An agenda can be at a summit.Logical formLearned from149 sentences. A summit can be on nuclear security.Logical formLearned from149 sentences. A summit may close.Logical formLearned from148 sentences. A summit may pertain-to an organization.Logical formLearned from147 sentences. An opening may pertain-to a summit.Logical formLearned from146 sentences. Talks can be at a summit.Logical formLearned from146 sentences. A summit can be nice.Logical formLearned from145 sentences. A summit may undergo importance.Logical formLearned from144 sentences. Some summit can be in a US-city.Logical formLearned from143 sentences. A summit can be a chance.Logical formLearned from143 sentences. A date may pertain-to a summit.Logical formLearned from143 sentences. An (emergency summit) can be constituted-of-or-filled-with leaders.Logical formLearned from143 sentences. A (summit meeting) can be in a US-city.Logical formLearned from143 sentences.