A man is getting a book autographed.
The man was buying diapers at the local Costco
The man can't be getting a book authographed while buying diapers.
exists e2 e1 x1 x2 x3.(Theme(e2,x2) & Actor(e2,x1) & v_get(e2) & Theme(e1,x3) & v_autograph(e1) & (x2 = x3) & n_book(x2) & n_man(x1))
exists e1 s1 x1 x2 x3.(n_costco(x3) & a_local(s1) & Theme(s1,x3) & n_man(x1) & at(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_buy(e1) & n_diaper(x2))