A man in a yellow tie is rubbing the back of his neck.
The man is wearing a purple tie
you have to wear either one tie or the other cannot be both purple tie and also the yellow one.
exists e1 s1 x1 x2 x3 x4.(n_neck(x4) & of(x4,x3) & n_male(x3) & n_back(x3) & Theme(e1,x3) & Actor(e1,x1) & v_rub(e1) & of(x3,x4) & in(x1,x2) & n_tie(x2) & a_yellow(s1) & Theme(s1,x2) & n_man(x1))
exists e1 s1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_tie(x2) & a_purple(s1) & Theme(s1,x2))