man and a woman sitting in black chairs drinking.
A man and woman drinking.
"Man and a woman" is a rephrasing of "A man and woman".
exists e1 s1 s2 x1 x2 x3 x4 x5.(a_topic(s1) & subset_of(x2,s1) & in(e1,x4) & n_drinking(x4) & of(x4,x5) & n_chair(x5) & a_black(s2) & Theme(s2,x4) & Actor(e1,x3) & v_sit(e1) & (x2 = x3) & n_woman(x2) & subset_of(x1,s1) & n_man(x1))
exists s1 x1 x2 x3.(a_topic(s1) & subset_of(x2,s1) & n_drinking(x2) & of(x2,x3) & n_woman(x3) & subset_of(x1,s1) & n_man(x1))