Man rides on bicycle as other people walk.
A man is riding a unicycle.
bicycle differs from unicyle
exists e1 x1 x2 x3 x4 x5.(n_people(x5) & Actor(e1,x1) & v_walk(e1) & as(x1,x4) & -(x4 = x5) & n_people(x4) & on(x1,x3) & n_bicycle(x3) & n_ride(x1) & of(x1,x2) & n_man(x2))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_unicycle(x2) & n_man(x1))