A skateboarder performing a kickflip over short stairs.
The skateboarder is Tony Hawk.
Many skateboarders can perform kickflips.  It does not prove that he is Tony Hawk.
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & over(e1,x4) & n_stair(x4) & a_short(s1) & Theme(s1,x4) & Theme(e1,x3) & Actor(e1,x2) & v_perform(e1) & n_kickflip(x3) & (x1 = x2) & n_skateboarder(x1))
exists p1 x1 x2 x3.(ne_per_hawk(x2) & (x2 = x3) & ne_per_tony(x3) & n_skateboarder(x1) & (x1 = x2))