a man doing tricks on a bmx bike
The man is up off the ground with his bike.
bike tricks do not have to be up off the ground
exists e1 x1 x2 x3 x4 x5.(a_topic(x1) & on(e1,x4) & n_bike(x4) & of(x4,x5) & n_bmx(x5) & Theme(e1,x3) & Actor(e1,x2) & v_do(e1) & n_trick(x3) & (x1 = x2) & n_man(x1))
exists p1 x1 x2 x3.(n_bike(x3) & of(x3,x2) & n_male(x2) & n_ground(x2) & n_man(x1) & r_up(x1) & off(x1,x2) & with(x2,x3))