Kids playing in a tub of plastic balls.
Some children are entertaining themselves.
Just because the kids are playing, doesn't mean they are entertaining themselves.
exists e1 x1 x2 x3 x4 x5.(a_topic(x1) & in(e1,x3) & of(x3,x4) & n_ball(x4) & of(x4,x5) & n_plastic(x5) & n_tub(x3) & Actor(e1,x2) & v_play(e1) & (x1 = x2) & n_kid(x1))
exists s1 s2 x1.(a_themselves(s2) & Manner(s1,s2) & Theme(s1,x1) & a_entertaining(s1) & n_child(x1))