A man and woman are on a couch, and they are both asleep.
An old couple are sleeping on the couch with the television still on.
A man and woman are sleeping on a couch but they aren't necessarily old. There may or may not be a television still on.
exists p1 s1 x1 x2 x3.(r_both(s1) & Theme(s1,x2) & a_asleep(s1) & n_thing(x2) & exists x4.(on(x1,x4) & n_couch(x4)) & n_woman(x3) & n_man(x2) & subset_of(x3,x1) & subset_of(x2,x1))
exists e1 s1 s2 s3 x1 x2 x3.(n_television(x3) & n_couch(x2) & a_on(s3) & Manner(e1,s3) & a_still(s2) & Manner(e1,s2) & on(e1,x2) & with(x2,x3) & Actor(e1,x1) & v_sleep(e1) & n_couple(x1) & a_old(s1) & Theme(s1,x1))