Cubs fans have paper bags on their heads that spell out "CUBS."
Cubs fans are at a home game.
Just because fans are wearing paper bags does not mean there is an ongoing game, and if there was an ongoing game this does not mean the game is at any specific location.
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 p1 x1 x2.(exists x3 x4.(at(x1,x3) & n_game(x3) & of(x3,x4) & n_home(x4)) & n_fan(x1) & (x1 = x2) & ne_nam_cubs(x2))