Two rock and roll performers on stage playing their guitars performing in front of a crowd.
One is male and one is female.
Two rock and roll performers are not necessarily that one is male and one is female.
exists e1 e2 x1 x2 x3 x4 x5 x6 x7 x8 x9.(a_topic(x1) & on(x1,x4) & Theme(e2,x6) & Actor(e2,x5) & v_play(e2) & in(e1,x8) & of(x8,x9) & n_crowd(x9) & n_front(x8) & Actor(e1,x7) & v_perform(e1) & (x6 = x7) & n_guitar(x6) & of(x6,x1) & n_thing(x1) & (x4 = x5) & n_stage(x4) & n_performer(x1) & of(x1,x3) & n_roll(x3) & of(x1,x2) & n_rock(x2) & card_eq_2(x1))
exists s1 s2 x1 x2.(Theme(s2,x2) & a_female(s2) & n_thing(x2) & card_eq_1(x2) & Theme(s1,x1) & a_male(s1) & n_thing(x1) & card_eq_1(x1))