A pair of older boys play guitars.
The guitars are tuned correctly.
Guitars do not need to be tuned correctly for you to play them.
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 s1 x1.(n_guitar(x1) & a_correctly(s1) & Manner(e1,s1) & Theme(e1,x1) & v_tune(e1))