Two males playing at a jazz concert.
Two men play instruments for a charity concert.
Male doesn't necessarily mean men. Playing doesn't necessarily mean playing musical instruments. Not all charity concerts are jazz concerts
exists e1 x1 x2 x3 x4.(a_topic(x1) & at(e1,x3) & n_concert(x3) & of(x3,x4) & n_jazz(x4) & Actor(e1,x2) & v_play(e1) & (x1 = x2) & n_male(x1) & card_eq_2(x1))
exists e1 x1 x2 x3 x4.(for(e1,x3) & n_concert(x3) & of(x3,x4) & n_charity(x4) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_instrument(x2) & n_man(x1) & card_eq_2(x1))