An example, this is the result of (setq ent (entget (car (eltsel "\nSelect object: "))))   ((-1 . <Entity name: 1770492fe00>) (0 . "POLYLINE") (330 . <Entity name: 176be833f00>) (5 . "BBD8") (100 . "AcDbEntity") (67 . 0) (410 . "Model") (8 . "0") (100 . "AcDb3dPolyline") (66 . 1) (10 0.0 0.0 0.0) ...   (assoc 100 ent) will return  (100 . "AcDbEntity"). How do I get that second one, the  (100 . "AcDb3dPolyline") ?