A man in black is purchasing something at the register in a store.
A man is purchasing an item for his mother's birthday.
The man may be purchasing something that is not for his mother's birthday.
exists e1 x1 x2 x3 x4 x5.(n_register(x4) & in(e1,x5) & n_store(x5) & at(e1,x4) & Theme(e1,x3) & Actor(e1,x1) & v_purchase(e1) & n_thing(x3) & in(x1,x2) & n_black(x2) & n_man(x1))
exists e1 x1 x2 x3 x4.(for(e1,x4) & n_birthday(x4) & of(x4,x3) & n_mother(x3) & of(x3,x1) & n_male(x1) & Theme(e1,x2) & Actor(e1,x1) & v_purchase(e1) & n_item(x2) & n_man(x1))