Men are seated near some drums.
Women are seated near some drums.
There can either be men or women.
exists e1 x1 x2.(near(e1,x2) & n_drum(x2) & Theme(e1,x1) & v_seat(e1) & n_man(x1))
exists e1 x1 x2.(near(e1,x2) & n_drum(x2) & Theme(e1,x1) & v_seat(e1) & n_woman(x1))