Two people in chef's garb doing a demonstration at a KitchenAid booth.
No one is sitting at the bar.
Two people in chef's garb doing a demonstration in no way refer to a situation of no one sitting at the bar.
exists e1 x1 x2 x3 x4 x5 x6 x7.(a_topic(x1) & at(e1,x6) & n_booth(x6) & of(x6,x7) & n_kitchenaid(x7) & Theme(e1,x5) & Actor(e1,x4) & v_do(e1) & n_demonstration(x5) & (x1 = x4) & in(x1,x3) & n_garb(x3) & of(x3,x2) & n_chef(x2) & n_people(x1) & card_eq_2(x1))
exists x2.(n_bar(x2) & -exists e1 x1.(at(e1,x2) & Actor(e1,x1) & v_sit(e1) & n_one(x1)))