Young skateboarder doing a trick in the park.
The Young skateboarder is a pro skater
Not all skateboarders are a pro skater
exists e1 s1 x1 x2 x3 x4.(n_park(x4) & a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_do(e1) & in(x3,x4) & n_trick(x3) & (x1 = x2) & n_skateboarder(x1) & a_young(s1) & Theme(s1,x1))
exists p1 x1 x2.(n_skateboarder(x1) & (x1 = x2) & ne_nam_young(x2) & exists s1 x3.((x1 = x3) & n_skater(x3) & a_pro(s1) & Theme(s1,x3)))