There are four kids practicing what appears to be karate.
Four kids are being taught karate.
Just beacuse the kids are practising karate does not mean they are being taught
exists p1 x1 x2 x3.((x1 = x2) & exists e2 e1 p2 x4.(n_thing(x4) & Theme(e2,x4) & Actor(e2,x3) & v_practice(e2) & Topic(e1,p2) & Actor(e1,x4) & v_appear(e1) & exists s1.(Theme(s1,x4) & a_karate(s1))) & (x2 = x3) & n_kid(x2) & card_eq_4(x2))
exists e1 x1 x2.(Recipient(e1,x2) & Theme(e1,x1) & v_teach(e1) & n_karate(x2) & n_kid(x1) & card_eq_4(x1))