The man has fallen asleep on the couch.
Grandpa has fallen into a deep sleep on the new couch at his son's house.
Not all men are Grandpa.  Not all sleeps are deep sleeps.  Not all couches are new couches.
exists e1 s1 x1 x2.(n_couch(x2) & n_man(x1) & on(e1,x2) & a_asleep(s1) & Manner(e1,s1) & Actor(e1,x1) & v_fall(e1))
exists e1 s1 s2 x1 x2 x3 x4 x5.(n_house(x5) & of(x5,x4) & n_son(x4) & of(x4,x3) & n_male(x3) & n_couch(x3) & a_new(s2) & Theme(s2,x3) & ne_geo_grandpa(x1) & at(e1,x5) & into(e1,x2) & on(x2,x3) & n_sleep(x2) & a_deep(s1) & Theme(s1,x2) & Actor(e1,x1) & v_fall(e1))