Two musicians practicing for a performance.
Two people play music.
Music is played for showing a performance.
exists e1 x1 x2 x3.(a_topic(x1) & for(e1,x3) & n_performance(x3) & Actor(e1,x2) & v_practice(e1) & (x1 = x2) & n_musician(x1) & card_eq_2(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_music(x2) & n_people(x1) & card_eq_2(x1))