Boy and girl practicing marshal art on a blue mat.
The girl and boy are dancing.
Dancing is not the same action as practicing a martial art.
exists s1 s2 x1 x2 x3 x4 x5.(a_topic(x1) & on(x1,x5) & n_mat(x5) & a_blue(s2) & Theme(s2,x5) & n_art(x1) & a_marshal(s1) & Theme(s1,x1) & of(x1,x4) & n_practicing(x4) & of(x1,x3) & n_girl(x3) & (x1 = x2) & ne_nam_boy(x2))
exists e1 x1 x2 x3.(n_boy(x3) & n_girl(x2) & subset_of(x3,x1) & subset_of(x2,x1) & Actor(e1,x1) & v_dance(e1))