A father and his boy focusing through a telescope.
A father teaches his son about the stars.
Just because a father and son are using a telescope does not mean the father teaches the son anything, or that they are learning about the stars.
exists e1 s1 x1 x2 x3 x4.(a_topic(s1) & subset_of(x2,s1) & through(e1,x4) & n_telescope(x4) & Actor(e1,x3) & v_focus(e1) & (x2 = x3) & n_boy(x2) & of(x2,x1) & n_male(x1) & subset_of(x1,s1) & n_father(x1))
exists e1 x1 x2 x3.(n_star(x3) & about(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_teach(e1) & n_son(x2) & of(x2,x1) & n_male(x1) & n_father(x1))