A gap can be between a region.Logical formLearned from10 sentences. An (income gap) can be urban.Logical formLearned from10 sentences. Gaps can be in systems.Logical formLearned from10 sentences. A gap can be between urban areas.Logical formLearned from10 sentences. A (development gap) can be between countries.Logical formLearned from10 sentences. A gap may remain great.Logical formLearned from10 sentences. Globalization may widen a gap.Logical formLearned from10 sentences. A gap can be between a cylinder.Logical formLearned from10 sentences. A portion may pertain-to a (wage gap).Logical formLearned from10 sentences. A gap can be between a field.Logical formLearned from10 sentences. Some gaps can be in research.Logical formLearned from10 sentences. A (generation gap) can be apparent.Logical formLearned from10 sentences. A gap can be between father.Logical formLearned from10 sentences. A gap may emerge.Logical formLearned from10 sentences. Gaps can be between primes.Logical formLearned from10 sentences.