. . "The Unincorporated part of Springfield is the district that connects Evergreen Terrace with Springshire and made its one and only appearance in the season 17 episode \u201CMarge's Son Poisoning\u201D."@en . . . . "The Unincorporated part of Springfield is the district that connects Evergreen Terrace with Springshire and made its one and only appearance in the season 17 episode \u201CMarge's Son Poisoning\u201D."@en . "Unincorporated part of Springfield"@en .