AutoCAD Customization: Visual LISP, AutoLISP and General Customization: AEC Window Block - how to extract ht width and head height

When I go to extract DXF code info out of an AEC Window block (primarily looking for window width, height, and head ht codes) I get the following information which is very basic. is there a way to drill down further to get more data on the information I'm looking for?

(setq ed (entget ( car (entsel))))

Select object: ((-1 . <Entity name: 7fffee1c020>) (0 . "AEC_WINDOW") (330 . <Entity name: 7ffff1e09f0>) (5 . "64CA") (100 . "AcDbEntity") (67 . 0) (410 . "Model") (8 . "A-Glaz-F1"))

Thanks,

John W