A little boy is playing with a skateboard.
A boy practicing skating.
playing with a skateboard means practicing skating.
exists e1 s1 x1 x2.(with(e1,x2) & n_skateboard(x2) & Actor(e1,x1) & v_play(e1) & n_boy(x1) & a_little(s1) & Theme(s1,x1))
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_practice(e1) & n_skating(x3) & (x1 = x2) & n_boy(x1))