A man and a woman dance happily.
A couple are dancing.
The man and woman dance happily so they are dancing.
exists s1 x1 x2 x3.(a_topic(s1) & subset_of(x2,s1) & r_happily(x2) & n_dance(x2) & of(x2,x3) & n_woman(x3) & subset_of(x1,s1) & n_man(x1))
exists e1 x1.(Actor(e1,x1) & v_dance(e1) & n_couple(x1))