The subject is a list of sets,
and the objet is the difference of the sets in the objectThis set contains that as a member.
Cwm will bind the subject to each of the members of the object.The subject is a list of sets,
and the objet is the intersection of the sets in the objectThis is a member of that set.
Cwm will bind the object to each of the members of the suject.The subject is a list of sets,
and the objet is the symmetricDifference of the sets in the objectThe subject is a list [sic] of sets,
and the objet is the union of the sets in the object