Two men are wearing black hats and carrying bagpipes.
Two men are getting ready for the concert.
There are other occasions where one might be wearing a black hat or carrying bagpipes. Doesn't necessarily have to be a concert.
exists e1 e2 s1 x1 x2 x3 x4.(Theme(e2,x4) & Actor(e2,x3) & v_carry(e2) & n_bagpipe(x4) & n_man(x3) & card_eq_2(x3) & Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_hat(x2) & a_black(s1) & Theme(s1,x2) & n_man(x1) & card_eq_2(x1))
exists e1 p1 x1 x2.(n_concert(x2) & exists s1.(for(s1,x2) & Theme(s1,x1) & a_ready(s1)) & Topic(e1,p1) & Actor(e1,x1) & v_get(e1) & n_man(x1) & card_eq_2(x1))