A skateboarder making a jump.
A skateboarder is trying a trick
Not every skateboarder is trying a trick.
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_make(e1) & n_jump(x3) & (x1 = x2) & n_skateboarder(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_try(e1) & n_trick(x2) & n_skateboarder(x1))