A boy mountain bikes down a trail.
A boy is riding down a bike trail, out of control.
Just because he is riding down a trail does ot mean he is out of control.
exists x1 x2 x3 x4.(a_topic(x1) & down(x1,x4) & n_trail(x4) & n_bike(x1) & of(x1,x3) & n_mountain(x3) & of(x1,x2) & n_boy(x2))
exists e1 s1 x1 x2 x3 x4.(of(e1,x4) & n_control(x4) & r_out(e1) & a_down(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_trail(x2) & of(x2,x3) & n_bike(x3) & n_boy(x1))