A group of girls is sitting in the dance studio.
The room is empty except for a small boy.
He refers to a group of girls not a small boy. The room cannot be empty if a group of girls is sitting in it.
exists e1 x1 x2 x3 x4.(n_studio(x3) & of(x3,x4) & n_dance(x4) & in(e1,x3) & Actor(e1,x1) & v_sit(e1) & of(x1,x2) & n_girl(x2) & n_group(x1))
exists s1 s2 x1 x2.(n_room(x1) & r_except(s1) & for(s1,x2) & n_boy(x2) & a_small(s2) & Theme(s2,x2) & Theme(s1,x1) & a_empty(s1))