A man rides a bicycle with his arm outstretched.
a man on a bicycle
A man who rides a bicycle is on it.
exists e1 e2 x1 x2 x3 x4.(with(e1,x3) & Actor(e2,x4) & v_outstretch(e2) & (x3 = x4) & n_arm(x3) & of(x3,x1) & n_male(x1) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bicycle(x2) & n_man(x1))
exists x1 x2.(a_topic(x1) & on(x1,x2) & n_bicycle(x2) & n_man(x1))