An overweight couple walking.
The people are walking outside.
WE DON'T KNOW THAT THE OVERWEIGHT COUPLE IS OUTSIDE.
exists s1 x1 x2.(a_topic(x1) & n_walking(x1) & of(x1,x2) & n_couple(x2) & a_overweight(s1) & Theme(s1,x1))
exists e1 s1 x1.(n_people(x1) & a_outside(s1) & Manner(e1,s1) & Actor(e1,x1) & v_walk(e1))