A girl dances with a person dressed as Stitch.
Mike walked home.
Once sentence deals with a girl and the other with a guy named Mike.  These sentences seem totally unrelated and not necessarily contradictory.
exists e1 e2 x1 x2 x3 x4.(ne_nam_stitch(x4) & with(e1,x2) & as(e2,x4) & Theme(e2,x3) & v_dress(e2) & (x2 = x3) & n_person(x2) & Actor(e1,x1) & v_dance(e1) & n_girl(x1))
exists e1 x1 x2.(ne_per_mike(x1) & Time(e1,x2) & n_home(x2) & Actor(e1,x1) & v_walk(e1))