A man and a woman sitting at a table.
A couple are sitting at their table.
Sitting at the same table does not mean the man and woman are a couple.
exists e1 s1 x1 x2 x3 x4.(a_topic(s1) & subset_of(x2,s1) & at(e1,x4) & n_table(x4) & Actor(e1,x3) & v_sit(e1) & (x2 = x3) & n_woman(x2) & subset_of(x1,s1) & n_man(x1))
exists e1 x1 x2.(at(e1,x2) & n_table(x2) & of(x2,x1) & n_thing(x1) & Actor(e1,x1) & v_sit(e1) & n_couple(x1))