A small girl standing on a chair in a restaurant fiddles with a large machine.
The girl is not being supervised by an adult.
Just because the child is fiddling with a machine doesn't mean she isn't being supervised by an adult.
exists e1 s1 s2 x1 x2 x3 x4 x5.(with(e1,x5) & n_machine(x5) & a_large(s2) & Theme(s2,x5) & Actor(e1,x1) & v_fiddle(e1) & on(x1,x3) & in(x3,x4) & n_restaurant(x4) & n_chair(x3) & n_standing(x1) & of(x1,x2) & n_girl(x2) & a_small(s1) & Theme(s1,x1))
exists x1.(n_girl(x1) & -exists e1 x2.(Actor(e1,x2) & n_adult(x2) & Theme(e1,x1) & v_supervise(e1)))