A middle-aged man and woman walking in a museum.
The man and woman were talking as they walked.
A man could be middle-aged.
exists s1 s2 x1 x2 x3 x4.(a_topic(s1) & subset_of(x2,s1) & in(x2,x4) & n_museum(x4) & n_walking(x2) & of(x2,x3) & n_woman(x3) & subset_of(x1,s1) & n_man(x1) & a_middle-aged(s2) & Theme(s2,x1))
exists e2 e1 x1 x2 x3 x4.(n_thing(x2) & n_woman(x3) & n_man(x2) & subset_of(x3,x1) & subset_of(x2,x1) & Actor(e2,x1) & v_walk(e2) & as(e1,x2) & Actor(e1,x4) & v_talk(e1) & (x1 = x4))