http://premon.fbk.eu/resource/vn33-free-80-1_frame an entity of type: VerbNetFrame

8.1 
NP V NP S_ING 
NP-P-ING-OC; of-PP 
cause(Causer, E) not(free(start(E), Theme, Source)) free(end(E), Theme, Source) 
Causer V Source {of} Theme [+oc_ing] 
0.2 

data from the linked data cloud