a family crossing a bridge
Several people open presents around a Christmas tree.
One cannot be around a Christmas tree and be crossing a bridge simultaneously.
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_cross(e1) & n_bridge(x3) & (x1 = x2) & n_family(x1))
exists s1 s2 x1 x2 x3 x4 x5.(a_topic(x1) & Theme(s2,x3) & Actor(s2,x2) & a_open(s2) & around(x3,x4) & n_tree(x4) & (x4 = x5) & ne_tim_christmas(x5) & n_present(x3) & (x1 = x2) & n_people(x1) & a_several(s1) & Theme(s1,x1))