@keywords is, of, a.

@prefix log: <http://www.w3.org/2000/10/swap/log#>.
@prefix : <#>.

<> a K.

{?U a ?P. <> log:semantics ?F. ?F log:notIncludes {?U p ?V}} => {?U a N}.
{?U a K. ?U log:semantics ?F. ?F log:includes {s q (?A ?B ?C)}} => {?U r (?A ?B ?C)}.
{<> log:semantics ?F. ?F log:notIncludes {?D e ?F}} => {test a OK}.