Two men are smiling while sitting behind a fruit stand.
There are men sitting.
sitting behind a fruit stand  is inferred as men sitting.
exists e1 e2 x1 x2 x3.(while(e1,e2) & behind(e2,x2) & n_stand(x2) & of(x2,x3) & n_fruit(x3) & Actor(e2,x1) & v_sit(e2) & Actor(e1,x1) & v_smile(e1) & n_man(x1) & card_eq_2(x1))
exists p1 x1 e1 x2 x3.((x1 = x2) & Actor(e1,x3) & v_sit(e1) & (x2 = x3) & n_man(x2))