Two men playing the guitar.
A pair of guys are strumming guitars.
The two men playing the guitar are strumming the guitars.
exists e1 x1 x2 x3.(n_guitar(x3) & a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & (x1 = x2) & n_man(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_strum(e1) & n_guitar(x3) & of(x1,x2) & n_guy(x2) & n_pair(x1))