A man in a darkened room performing skateboard tricks.
A man is practicing for a skateboard show.
a man can be performing without practicing
exists e1 s1 x1 x2 x3 x4 x5.(a_topic(x1) & in(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_perform(e1) & n_trick(x4) & of(x4,x5) & n_skateboard(x5) & (x2 = x3) & n_room(x2) & a_darkened(s1) & Theme(s1,x2) & n_man(x1))
exists e1 x1 x2 x3.(for(e1,x2) & n_show(x2) & of(x2,x3) & n_skateboard(x3) & Actor(e1,x1) & v_practice(e1) & n_man(x1))