A girl in a white coat stands in the middle of a fountain and a boy in the background laughs.
A girl gets wet playing in a fountian as her brother watches and laughs.
A girl does not always get wet playing  in a fountain.  Not all boys and girls are brother and sister. Not all boys in the background are watching the girl in the fountain.
exists e1 s1 x1 x2 x3 x4 x5 x6 x7 x8.(n_background(x8) & n_middle(x4) & Actor(e1,x1) & v_laugh(e1) & in(x1,x2) & in(x2,x4) & of(x4,x5) & subset_of(x7,x5) & in(x7,x8) & n_boy(x7) & subset_of(x6,x5) & n_fountain(x6) & n_stand(x2) & of(x2,x3) & n_coat(x3) & a_white(s1) & Theme(s1,x2) & n_girl(x1))
exists e1 s1 x1 x2 x3 x4 x5 x6 x7.(as(e1,x4) & n_laugh(x6) & n_watch(x5) & of(x5,x7) & n_brother(x7) & subset_of(x6,x4) & subset_of(x5,x4) & of(x4,x1) & n_female(x1) & Theme(e1,x2) & Actor(e1,x1) & v_get(e1) & in(x2,x3) & n_fountian(x3) & n_playing(x2) & a_wet(s1) & Theme(s1,x2) & n_girl(x1))