Two feet wearing yellow ski boots on ski
The feet had on blue sandals.
Two feet cannot be wearing yellow ski boots and blue sandals simultaneously.
exists e1 s1 x1 x2 x3 x4 x5.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & on(x3,x5) & n_ski(x5) & n_boot(x3) & of(x3,x4) & n_ski(x4) & a_yellow(s1) & Theme(s1,x3) & (x1 = x2) & n_foot(x1) & card_eq_2(x1))
exists e1 s1 x1 x2.(n_foot(x1) & on(e1,x2) & n_sandal(x2) & a_blue(s1) & Theme(s1,x2) & Actor(e1,x1) & v_have(e1))