Input (grade 12): Legal problems delayed permission to build the subway and tram route and it was not until 1906 that permission to build was granted and then not to cross the bridge.
Output (grade 8): However, there were legal problems and these delayed the permission that was needed to build the subway and tram route. Permission to build the subway was not given until 1906, and they were still not allowed to build the tram line over the bridge.