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

:a :b :c.
{ ?s ?p :C } <= { ?s ?p :c }.
{ ?s ?p :C } => { :TEST :PASS 3.1 }.
{ :a ?p :C. ?p log:equalTo :b } => { :TEST :PASS 3.2 }.
{ :a ?p :C } => { :TEST :PASS 3.3 }.
{ ?s ?p :C. ?p log:equalTo :b } => { :TEST :PASS 3.4 }.
