People sitting down in an Airplane.
A group of animals are fighting.
There is either a group of animals or people.
exists e1 s1 x1 x2 x3.(a_topic(x1) & in(e1,x3) & n_airplane(x3) & a_down(s1) & Manner(e1,s1) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_people(x1))
exists e1 x1 x2.(Actor(e1,x1) & v_fight(e1) & of(x1,x2) & n_animal(x2) & n_group(x1))