A little boy and elderly Lady are sharing a black umbrella.
Grandmother and her grandson share an umbrella.
A boy and elderly lady sharing an umbrella doesn't necessarily make them grandmother and her grandson.
exists e1 s1 s2 s3 x1 x2 x3 x4.(Theme(e1,x4) & Actor(e1,x1) & v_share(e1) & n_umbrella(x4) & a_black(s3) & Theme(s3,x4) & ne_nam_lady(x3) & a_elderly(s2) & Theme(s2,x3) & n_boy(x2) & a_little(s1) & Theme(s1,x2) & subset_of(x3,x1) & subset_of(x2,x1))
exists s1 x1.(ne_nam_grandmother(x1) & a_topic(s1) & all x3 x4 x2.((n_share(x3) & of(x3,x4) & n_grandson(x4) & of(x3,x2) & n_female(x2) & n_umbrella(x2)) -> (subset_of(x3,s1) & for(x3,x2))) & subset_of(x1,s1))