People talking and having fun.
There are no people in the room.
If there are no people in the room, nobody could be talking and having fun.
exists e1 e2 x1 x2 x3 x4.(Theme(e2,x4) & Actor(e2,x3) & v_have(e2) & n_fun(x4) & n_people(x3) & Theme(e1,x2) & Actor(e1,x1) & v_talk(e1) & n_fun(x2) & n_people(x1))
exists p1 x1 x2.(n_room(x2) & in(p1,x2) & -exists x3.((x1 = x3) & n_people(x3)))