A crowd of people are socializing.
People are chatting with each other.
Chatting is a form of socializing
exists e1 x1 x2.(Actor(e1,x1) & v_socialize(e1) & of(x1,x2) & n_people(x2) & n_crowd(x1))
exists e1 x1.(all x2.(n_other(x2) -> with(e1,x2)) & Actor(e1,x1) & v_chat(e1) & n_people(x1))