A young woman and a young boy stand on the shore of a river.
A woman and her son stand near the river.
If a woman and a young boy stand near the river, it doesn't mean that the boy is her son, nor does it mean that the woman is young.
exists s1 s2 s3 x1 x2 x3 x4 x5.(n_shore(x4) & a_topic(s1) & subset_of(x2,s1) & on(x2,x4) & of(x4,x5) & n_river(x5) & n_stand(x2) & of(x2,x3) & n_boy(x3) & a_young(s3) & Theme(s3,x2) & subset_of(x1,s1) & n_woman(x1) & a_young(s2) & Theme(s2,x1))
exists e1 x1 x2 x3 x4.(n_river(x4) & near(e1,x4) & Actor(e1,x1) & v_stand(e1) & subset_of(x3,x1) & n_son(x3) & of(x3,x2) & n_female(x2) & subset_of(x2,x1) & n_woman(x2))