A man in a hat is walking in a parking lot.
A man searches for his lost car
A man who is walking in a parking lot doesn't necessarily mean it is because he searches for his lost car.
exists e1 x1 x2 x3 x4.(in(e1,x3) & n_lot(x3) & of(x3,x4) & n_parking(x4) & Actor(e1,x1) & v_walk(e1) & in(x1,x2) & n_hat(x2) & n_man(x1))
exists e1 s1 x1 x2.(for(e1,x2) & n_car(x2) & a_lost(s1) & Theme(s1,x2) & of(x2,x1) & n_male(x1) & Actor(e1,x1) & v_search(e1) & n_man(x1))