A Mariachi band is playing on a city street.
Musicians wearing hats are entertaining a crowd.
The musicians may not be wearing hats and there isn't necessarily a crowd.
exists e1 x1 x2 x3 x4.(on(e1,x3) & n_street(x3) & of(x3,x4) & n_city(x4) & Actor(e1,x1) & v_play(e1) & n_band(x1) & (x1 = x2) & ne_nam_mariachi(x2))
exists e1 e2 x1 x2 x3.(Theme(e2,x3) & Actor(e2,x1) & v_entertain(e2) & n_crowd(x3) & n_hat(x1) & Actor(e1,x1) & v_wear(e1) & (x1 = x2) & ne_nam_musicians(x2))