Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| City | Operator | Type designation | Number of vehicles | Width |
| --- | --- | --- | --- | --- |
| Bonn , Germany | SWB | K5000 | 15.0 | 2.65 m |
| Bursa , Turkey | Bursaray | U5-2010 Bursa | 30.0 | 2.65 m |
| Cologne , Germany | KVB | K5000 | 59.0 | 2.65 m |
| Cologne , Germany | KVB | K5200 | 15.0 | 2.65 m |
| Frankfurt am Main , Germany | VgF | U5-25 (Bi-directional) | 54.0 | 2.65 m |
| Frankfurt am Main , Germany | VgF | U5-50 (Uni-directional) | 92.0 | 2.65 m |
| İzmir , Turkey | İzmir Metro | MD | 30.0 | 2.65 m |
| İzmir , Turkey | İzmir Metro | M | 15.0 | 2.65 m |
| Greater Manchester , England | Metrolink | M5000 | 94.0 | 2.65 m |
| Rotterdam , Netherlands | RET | MG2/1, SG2/1 | 81.0 | 2.664 m |
| Rotterdam , Netherlands | RET | RSG3 | 64.0 | 2.664 m |
Question:
Which Number of vehicles has a Type designation of u5-25 (bi-directional)?
Answer:
54.0