A crowd observes a celebration.
girls chatting
Observes implies looking or watching.
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_observe(e1) & n_celebration(x2) & n_crowd(x1))
exists e1 x1 x2.(a_topic(x1) & Actor(e1,x2) & v_chat(e1) & (x1 = x2) & n_girl(x1))