Guy in blue shirt dances with girl in white shirt.
Guy dances with another guy
To dance with a guy cannot happen if one is dancing with a girl.
exists s1 s2 s3 x1 x2 x3 x4.(ne_nam_guy(s1) & a_topic(s1) & in(s1,x1) & with(x1,x3) & in(x3,x4) & n_shirt(x4) & a_white(s3) & Theme(s3,x4) & n_girl(x3) & n_dance(x1) & of(x1,x2) & n_shirt(x2) & a_blue(s2) & Theme(s2,x1))
exists e1 x1 x2 x3.(n_guy(x2) & ne_nam_guy(x1) & with(e1,x3) & n_guy(x3) & -(x3 = x2) & Actor(e1,x1) & v_dance(e1))