A boy on a skateboard grinding down a handrail.
A skateboarder is grinding their way to class.
The skateboarder may not have class and may not be making their way to class.
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & on(x1,x2) & a_down(s1) & Manner(e1,s1) & Theme(e1,x4) & Actor(e1,x3) & v_grind(e1) & n_handrail(x4) & (x2 = x3) & n_skateboard(x2) & n_boy(x1))
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_grind(e1) & to(x2,x3) & n_class(x3) & n_way(x2) & of(x2,x1) & n_thing(x1) & n_skateboarder(x1))