Several children are playing in water fountains.
Some boys are playing in the water.
not all children playing in water are boys
exists e1 s1 x1 x2 x3.(in(e1,x2) & n_fountain(x2) & of(x2,x3) & n_water(x3) & Actor(e1,x1) & v_play(e1) & n_child(x1) & a_several(s1) & Theme(s1,x1))
exists e1 x1 x2.(n_water(x2) & in(e1,x2) & Actor(e1,x1) & v_play(e1) & n_boy(x1))