A man and woman drink beer at a bar.
A couple are enjoying themselves at a bar while dancing
Just because they were at the bar did not mean they were enjoying themselves and dancing.
exists s1 x1 x2 x3 x4 x5.(a_topic(s1) & subset_of(x2,s1) & at(x2,x5) & n_bar(x5) & n_beer(x2) & of(x2,x4) & n_drink(x4) & of(x2,x3) & n_woman(x3) & subset_of(x1,s1) & n_man(x1))
exists e1 e2 x1 x2 x3.(n_group(x2) & while(e1,e2) & Actor(e2,x1) & v_dance(e2) & at(e1,x3) & n_bar(x3) & Theme(e1,x2) & Actor(e1,x1) & v_enjoy(e1) & n_couple(x1))