A man wearing a helmet is jumping his bike down a staircase.
A man is trying to evade the police chasing him.
Although he is jumping his bike down a staircase, it does not imply he is trying to evade the police chasing him.
exists e1 e2 x1 x2 x3 x4 x5.(down(e2,x5) & n_staircase(x5) & Theme(e2,x4) & Actor(e2,x1) & v_jump(e2) & n_bike(x4) & of(x4,x1) & n_male(x1) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_helmet(x3) & (x1 = x2) & n_man(x1))
exists e1 p1 x1 x2.(n_male(x2) & n_police(x2) & Topic(e1,p1) & Actor(e1,x1) & v_try(e1) & exists e3 e2 x3.(Theme(e3,x2) & Actor(e3,x1) & v_evade(e3) & Theme(e2,x2) & Actor(e2,x3) & v_chase(e2) & (x2 = x3)) & n_man(x1))