An (alliance summit) can be in a world-city.Logical formLearned from44 sentences. (Summit talks) may pertain-to a weekday.Logical formLearned from44 sentences. A summit may be held under security.Logical formLearned from44 sentences. A plenary session may pertain-to a summit.Logical formLearned from44 sentences. A summit may be opened.Logical formLearned from43 sentences. (Summit talks) can be in a country.Logical formLearned from43 sentences. A summit can be unnamed.Logical formLearned from43 sentences. Attendance can be at a summit.Logical formLearned from43 sentences. A summit can be on global warming.Logical formLearned from43 sentences. A (summit meeting) may pertain-to a weekend.Logical formLearned from43 sentences. A summit may pertain-to a rock.Logical formLearned from43 sentences. A summit may pertain-to a line.Logical formLearned from43 sentences. A summit can be icy.Logical formLearned from43 sentences. A (summit meeting) may take place.Logical formLearned from43 sentences. A summit can be between leaders.Logical formLearned from43 sentences.