https://w3id.org/framester/framenet/abox/lu/null.a <https://w3id.org/framester/framenet/tbox/LexUnit>

xsd:string null.a 
xsd:string COD: having no legal force; invalid. 
xsd:string F 
<https://w3id.org/framester/framenet/tbox/LexUnit>
<https://w3id.org/framester/framenet/abox/frame/Being_in_effect>

risorse dalla linked data cloud