The man in the black jacket is waiting.
A cat chases a rat.
Either there is a man or a cat
exists e1 s1 x1 x2.(n_jacket(x2) & a_black(s1) & Theme(s1,x2) & n_man(x1) & Actor(e1,x1) & v_wait(e1) & in(x1,x2))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_chase(e1) & n_rat(x2) & n_cat(x1))