A man waits at a crosswalk holding a motorbike helmet.
A man with his hands full of grocery bags is in the middle of the street.
If a man has his hands full of grocery bags, he can't be holding a helmet.  Someone who waits is unlikely to be in the middle of the street.
exists e1 e2 x1 x2 x3 x4 x5.(at(e1,x2) & Theme(e2,x4) & Actor(e2,x3) & v_hold(e2) & n_helmet(x4) & of(x4,x5) & n_motorbike(x5) & (x2 = x3) & n_crosswalk(x2) & Actor(e1,x1) & v_wait(e1) & n_man(x1))
exists p1 s1 x1 x2 x3 x4 x5 x6 x7.(n_street(x7) & n_middle(x6) & in(x1,x6) & of(x6,x7) & with(x1,x2) & of(s1,x4) & n_bag(x4) & of(x4,x5) & n_grocery(x5) & Theme(s1,x3) & a_full(s1) & (x2 = x3) & n_hand(x2) & of(x2,x1) & n_male(x1) & n_man(x1))