Cubs fans have paper bags on their heads that spell out "CUBS."
The baseball fans are at the stadium, watching a game.
Just because fans are wearing paper bags does not mean the fans are interested in baseball, nor does it mean the fans are at a stadium, nor does it mean there is an ongoing game, nor does it mean the fans are watching anything in particular.
exists e1 e2 s1 x1 x2 x3 x4 x5 x6 x7.(Theme(e2,x3) & Actor(e2,x1) & v_have(e2) & a_out(s1) & Manner(e1,s1) & Theme(e1,x7) & Actor(e1,x6) & v_spell(e1) & n_cub(x7) & (x3 = x6) & on(x3,x5) & n_head(x5) & of(x5,x1) & n_thing(x1) & n_bag(x3) & of(x3,x4) & n_paper(x4) & n_fan(x1) & (x1 = x2) & ne_nam_cubs(x2))
exists e1 p1 x1 x2 x3 x4.(n_stadium(x4) & n_fan(x1) & of(x1,x2) & n_baseball(x2) & for(p1,e1) & Theme(e1,x3) & Actor(e1,x1) & v_watch(e1) & n_game(x3) & at(x1,x4))