A man locking his bicycle to a metal pole.
The man is wearing a helmet.
Not all man locking his bicycle to a metal pole is wearing a helmet.
exists e1 x1 x2 x3 x4 x5.(a_topic(x1) & to(e1,x4) & n_pole(x4) & of(x4,x5) & n_metal(x5) & Theme(e1,x3) & Actor(e1,x2) & v_lock(e1) & n_bicycle(x3) & of(x3,x1) & n_male(x1) & (x1 = x2) & n_man(x1))
exists e1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_helmet(x2))