a brown dog jumps over the grass.
A dog jumped over the couch.
Either the dog jumps over the grass or couch.
exists s1 x1 x2 x3.(n_grass(x3) & a_topic(x1) & over(x1,x3) & n_jump(x1) & of(x1,x2) & n_dog(x2) & a_brown(s1) & Theme(s1,x1))
exists e1 x1 x2.(n_couch(x2) & over(e1,x2) & Actor(e1,x1) & v_jump(e1) & n_dog(x1))