@prefix : <http://josd.github.io/eye/reasoning#>.

:marriedTo a :SymetricRelation.
:alice :marriedTo :bob.
:bob :marriedTo :alice.
{:alice :marriedTo :bob} :since "1999".
{:bob :marriedTo :alice} :since "1999".
:TEST :PASS 1 .
:TEST :PASS 2 .
:TEST :PASS 3 .

