A man demonstrates how to ride a bicycle with only the back wheel on the ground.
A man is doing a wheelie on a bike.
Wheelie implies only the back wheel on the ground.
exists e1 s1 x1 x2 x3 x7.(n_ground(x3) & n_wheel(x7) & a_back(s1) & Theme(s1,x7) & on(e1,x3) & Topic(e1,x2) & Actor(e1,x1) & v_demonstrate(e1) & n_manner(x2) & exists e2 x4 x5 x6.(all x8.(with(e2,x8) -> (x6 = x8)) & (x6 = x7) & with(e2,x7) & Theme(e2,x5) & Actor(e2,x4) & v_ride(e2) & n_bicycle(x5)) & n_man(x1))
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & on(x2,x3) & n_bike(x3) & n_wheelie(x2) & n_man(x1))