A little boy in a green shirt is playing in water with a little girl in a pink shirt and purple skirt.
The children were playing by the river.
Just because the children are playing in water does not necessarily mean they are by the river.
exists e1 s1 s2 s3 s4 x1 x2 x3 x4 x5 x6 x7 x8.(with(e1,x4) & subset_of(x7,x4) & n_skirt(x7) & of(x7,x8) & n_purple(x8) & subset_of(x5,x4) & in(x5,x6) & n_shirt(x6) & a_pink(s4) & Theme(s4,x6) & n_girl(x5) & a_little(s3) & Theme(s3,x5) & in(e1,x3) & n_water(x3) & Actor(e1,x1) & v_play(e1) & in(x1,x2) & n_shirt(x2) & a_green(s2) & Theme(s2,x2) & n_boy(x1) & a_little(s1) & Theme(s1,x1))
exists e1 x1 x2.(n_river(x2) & n_child(x1) & by(e1,x2) & Actor(e1,x1) & v_play(e1))