A group of people in a dark room are interacting.
A group of people are fighting in the dark room.
Not all interactions involve fighting.
exists e1 s1 x1 x2 x3.(Actor(e1,x1) & v_interact(e1) & of(x1,x2) & in(x2,x3) & n_room(x3) & a_dark(s1) & Theme(s1,x3) & n_people(x2) & n_group(x1))
exists e1 s1 x1 x2 x3.(n_room(x3) & a_dark(s1) & Theme(s1,x3) & in(e1,x3) & Actor(e1,x1) & v_fight(e1) & of(x1,x2) & n_people(x2) & n_group(x1))