An older man and woman exercise on treadmills.
A couple of people are in the gym.
The treadmills could be somewhere other than a gym.
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 p1 x1 x2 x3.(n_gym(x3) & in(x1,x3) & of(x1,x2) & n_people(x2) & n_couple(x1))