A group of people are talking in a public area.
People are chatting in public.
Talking involves chatting. A public area must be in public.
exists e1 s1 x1 x2 x3.(in(e1,x3) & n_area(x3) & a_public(s1) & Theme(s1,x3) & Actor(e1,x1) & v_talk(e1) & of(x1,x2) & n_people(x2) & n_group(x1))
exists e1 x1 x2.(in(e1,x2) & n_public(x2) & Actor(e1,x1) & v_chat(e1) & n_people(x1))