A bike rider performs a trick.
A trained stuntman showing his talent on a platform.
Not every bike rider is a trained stuntman, or is on a platform.
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_perform(e1) & n_trick(x3) & n_rider(x1) & of(x1,x2) & n_bike(x2))
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_show(e1) & on(x3,x4) & n_platform(x4) & n_talent(x3) & of(x3,x1) & n_male(x1) & (x1 = x2) & n_stuntman(x1) & a_trained(s1) & Theme(s1,x1))