An older man and woman exercise on treadmills.
The older couple are sitting down.
The couple either exercise or are sitting down.
exists s1 s2 x1 x2 x3 x4.(a_topic(s1) & subset_of(x2,s1) & on(x2,x4) & n_treadmill(x4) & n_exercise(x2) & of(x2,x3) & n_woman(x3) & subset_of(x1,s1) & n_man(x1) & r_more(s2) & a_older(s2) & Theme(s2,x1))
exists e1 s1 s2 x1.(n_couple(x1) & r_more(s1) & a_older(s1) & Theme(s1,x1) & a_down(s2) & Manner(e1,s2) & Actor(e1,x1) & v_sit(e1))