A man is pushing an old bike with something tied on to the back of it.
The man rides the bike down the busy street.
If a man rides the bike he can not be pushing the bike.
exists e2 e1 s1 x1 x2 x3 x4 x5.(n_back(x5) & Theme(e2,x2) & Actor(e2,x1) & v_push(e2) & with(x2,x3) & r_on(e1) & to(e1,x5) & of(x5,x1) & n_thing(x1) & Theme(e1,x4) & v_tie(e1) & (x3 = x4) & n_thing(x3) & n_bike(x2) & a_old(s1) & Theme(s1,x2) & n_man(x1))
exists e1 s1 x1 x2 x3.(n_street(x3) & a_busy(s1) & Theme(s1,x3) & n_bike(x2) & n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & down(x2,x3))