A guy in a white shirt skateboarding on a ramp.
A boy skateboards.
A guy in a white shirt skateboarding simply means a boy skateboards
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & in(x1,x2) & on(e1,x4) & n_ramp(x4) & Actor(e1,x3) & v_skateboard(e1) & (x2 = x3) & n_shirt(x2) & a_white(s1) & Theme(s1,x2) & n_guy(x1))
exists x1 x2.(a_topic(x1) & n_skateboard(x1) & of(x1,x2) & n_boy(x2))