(Command centers) can be underground.Logical formLearned from27 sentences. Attacks can be on a (trade center).Logical formLearned from27 sentences. A center can be constituted-of-or-filled-with communications.Logical formLearned from27 sentences. A geographic center may pertain-to a city.Logical formLearned from27 sentences. A world-city can be a center of the world.Logical formLearned from27 sentences. A center can be constituted-of-or-filled-with unrest.Logical formLearned from27 sentences. (Business centers) may pertain-to a country.Logical formLearned from27 sentences. A center may pertain-to a firestorm.Logical formLearned from27 sentences. A center can be cool.Logical formLearned from27 sentences. A (shopping center) can be planned.Logical formLearned from27 sentences. Lunch can be at a (cosmonaut training center).Logical formLearned from27 sentences. A (youth center) may undergo a demolition.Logical formLearned from27 sentences. A center can be gritty.Logical formLearned from27 sentences. A (call center) may pertain-to a world-city.Logical formLearned from27 sentences. A role can be as a center.Logical formLearned from27 sentences.