Several couples dance in a plaza.
The people are moving around.
The people are several couples that are moving around and dancing.
exists s1 x1 x2 x3.(a_topic(x1) & in(x1,x3) & n_plaza(x3) & n_dance(x1) & of(x1,x2) & n_couple(x2) & a_several(s1) & Theme(s1,x1))
exists e1 s1 x1.(n_people(x1) & a_around(s1) & Manner(e1,s1) & Actor(e1,x1) & v_move(e1))