three stilt walkers dressed in all white.
The walkers are dressed black.
Stilt walkers contradicts with only walkers which could be just walking.
exists e1 x1 x2.(all x3.(n_white(x3) -> in(e1,x3)) & Theme(e1,x1) & v_dress(e1) & n_walker(x1) & of(x1,x2) & n_stilt(x2) & card_eq_3(x1))
exists e1 s1 x1.(n_walker(x1) & a_black(s1) & Manner(e1,s1) & Theme(e1,x1) & v_dress(e1))