What is the fine-grained topic of the following text: Drive across the motorway-junction "Frankfurter Kreuz" till "Westkreuz Frankfurt", then take the motorway A 648 (towards "Stadtmitte" - B8/44) till Frankfurt Fair (Messe), in the roundabout turn left (towards "Ginnheim / Eschersheim" - B8/40). Only return the topic.
Driving directions to Frankfurt Fair (Messe)