Group of people dance with smiles at their faces.
Dancers are smiling.
dancers are a group of people who are dancing
exists s1 x1 x2 x3 x4.(ne_org_group(s1) & a_topic(s1) & of(s1,x1) & with(x1,x3) & at(x3,x4) & n_face(x4) & of(x4,x1) & n_thing(x1) & n_smile(x3) & Time(x1,x2) & n_dance(x2) & n_people(x1))
exists e1 x1.(Actor(e1,x1) & v_smile(e1) & n_dancer(x1))