A man and woman seated at a table together.
A couple sit at a table.
A man a woman that sit at a table together doesn't mean they are a couple.
exists e1 s1 s2 x1 x2 x3 x4.(a_topic(s1) & a_together(s2) & Manner(e1,s2) & at(e1,x4) & n_table(x4) & Theme(e1,x3) & v_seat(e1) & (s1 = x3) & n_woman(x2) & n_man(x1) & subset_of(x2,s1) & subset_of(x1,s1))
exists e1 x1 x2.(at(e1,x2) & n_table(x2) & Actor(e1,x1) & v_sit(e1) & n_couple(x1))