An elderly woman pushing a stroller
She is babysitting.
stroller doesn't imply  babysitting.
exists e1 s1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_push(e1) & n_stroller(x3) & (x1 = x2) & n_woman(x1) & a_elderly(s1) & Theme(s1,x1))
exists e1 x1.(n_female(x1) & Actor(e1,x1) & v_babysit(e1))