A lot of people are attending an aviation exposition.
A crowd of people at the auto show.
An auto show is not an aviation expo.
exists e1 x1 x2 x3 x4.(Theme(e1,x3) & Actor(e1,x1) & v_attend(e1) & n_exposition(x3) & of(x3,x4) & n_aviation(x4) & of(x1,x2) & n_people(x2) & n_lot(x1))
exists x1 x2 x3 x4.(n_show(x3) & of(x3,x4) & n_auto(x4) & a_topic(x1) & at(x1,x3) & of(x1,x2) & n_people(x2) & n_crowd(x1))