A group of people in a dark room are interacting.
A group of people talking in a dark room.
If people are talking they are interacting.
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 x4.(a_topic(x1) & of(x1,x2) & in(e1,x4) & n_room(x4) & a_dark(s1) & Theme(s1,x4) & Actor(e1,x3) & v_talk(e1) & (x2 = x3) & n_people(x2) & n_group(x1))