A pair of older boys play guitars.
The kids are playing the drums.
They are either playing the drums or the guitar.
exists e1 s1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_play(e1) & n_guitar(x3) & of(x1,x2) & n_boy(x2) & r_more(s1) & a_older(s1) & Theme(s1,x2) & n_pair(x1))
exists e1 x1 x2.(n_drum(x2) & n_kid(x1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1))