Two teenagers sweep a tile floor while a third teenager watches.
Two teenagers are hard workers while the third is lazy.
We cannot assume that just  because the two teenagers was sweeping while the third watch portrayed them as being hard workers or lazy.
(x)
exists p1 p2 x1 x3.(n_third(x3) & exists s2.(Theme(s2,x3) & a_lazy(s2)) & while(p1,p2) & exists s1 x2.((x1 = x2) & n_worker(x2) & a_hard(s1) & Theme(s1,x2)) & n_teenager(x1) & card_eq_2(x1))