Do not work directly in the imported DWG model.
Copy the required geometry separately according to the existing elements (alleys, benches, grass, etc.) and create groups for each one, to which you assign different tags. First in 2D.
You will work neatly and it will be much easier for you to create and modify the objects.
Look at the model attached to the way objects are grouped and structured (as an example).
parc-SU17.skp (4.3 MB)
