Two people are talking at an art gallery.
Two men are discussing art at the gallery.
Talking at an art gallery does not necessarily mean discussing art.
exists e1 x1 x2 x3.(at(e1,x2) & n_gallery(x2) & of(x2,x3) & n_art(x3) & Actor(e1,x1) & v_talk(e1) & n_people(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(n_gallery(x3) & at(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_discuss(e1) & n_art(x2) & n_man(x1) & card_eq_2(x1))