Children play in a water shooting fountain.
The children are building sandcastles.
It is not possible for the children to play in a water shooting fountain and be building sandcastles simultaneously.
exists x1 x2 x3 x4 x5.(a_topic(x1) & in(x1,x3) & n_fountain(x3) & of(x3,x5) & n_shooting(x5) & of(x3,x4) & n_water(x4) & n_play(x1) & (x1 = x2) & ne_nam_children(x2))
exists e1 x1 x2.(n_child(x1) & Theme(e1,x2) & Actor(e1,x1) & v_build(e1) & n_sandcastle(x2))