A child brushing her teeth.
A child is standing at the sink.
A child could be brushing her teeth and not standing at the sink, she could be standing at another location.
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_brush(e1) & n_tooth(x3) & of(x3,x1) & n_female(x1) & (x1 = x2) & n_child(x1))
exists e1 x1 x2.(n_sink(x2) & at(e1,x2) & Actor(e1,x1) & v_stand(e1) & n_child(x1))