A young boy looks through a tube.
A young boy looks at someone through a tube.
There is nothing to indicate that the boy looks at someone through the tube.
exists e1 s1 x1 x2.(through(e1,x2) & n_tube(x2) & Actor(e1,x1) & v_look(e1) & n_boy(x1) & a_young(s1) & Theme(s1,x1))
exists e1 s1 x1 x2 x3.(through(e1,x3) & n_tube(x3) & at(e1,x2) & n_person(x2) & Actor(e1,x1) & v_look(e1) & n_boy(x1) & a_young(s1) & Theme(s1,x1))