A group of children playing in the water fountain.
A group of children are sleeping.
When people are playing they are not sleeping.
exists e1 x1 x2 x3 x4 x5.(n_fountain(x4) & of(x4,x5) & n_water(x5) & a_topic(x1) & of(x1,x2) & in(e1,x4) & Actor(e1,x3) & v_play(e1) & (x2 = x3) & n_child(x2) & n_group(x1))
exists e1 x1 x2.(Actor(e1,x1) & v_sleep(e1) & of(x1,x2) & n_child(x2) & n_group(x1))