Two men playing guitar in a band.
two guys play guitars for their girls
The guys aren't necessarily playing for their girls.
exists e1 x1 x2 x3 x4.(a_topic(x1) & in(e1,x4) & n_band(x4) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_guitar(x3) & (x1 = x2) & n_man(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(for(e1,x3) & n_girl(x3) & of(x3,x1) & n_thing(x1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_guitar(x2) & n_guy(x1) & card_eq_2(x1))