A group of people stand on a sidewalk in the midst of a discussion.
People have a discussion about lunch outside.
People in the midst of a discussion are not always talking about lunch.
exists e1 x1 x2 x3 x4 x5.(n_midst(x4) & in(e1,x4) & of(x4,x5) & n_discussion(x5) & on(e1,x3) & n_sidewalk(x3) & Actor(e1,x1) & v_stand(e1) & of(x1,x2) & n_people(x2) & n_group(x1))
exists e1 x1 x2 x3 x4.(Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & about(x2,x3) & n_outside(x3) & of(x3,x4) & n_lunch(x4) & n_discussion(x2) & n_people(x1))