Four people talking during a shopping trip.
Four girls talking while shopping for shoes.
The people may not be girls. They may not be shopping for shoes.
exists e1 x1 x2 x3 x4.(a_topic(x1) & during(e1,x3) & n_trip(x3) & of(x3,x4) & n_shopping(x4) & Actor(e1,x2) & v_talk(e1) & (x1 = x2) & n_people(x1) & card_eq_4(x1))
exists e1 x1 x2 x3 x4.(a_topic(x1) & while(e1,x3) & for(x3,x4) & n_shoe(x4) & n_shopping(x3) & Actor(e1,x2) & v_talk(e1) & (x1 = x2) & n_girl(x1) & card_eq_4(x1))