A boy drawing boxes on his notebook.
the boy typed on the laptop while on the plane
typed and drawing are not the same.
exists e1 x1 x2 x3 x4.(a_topic(x1) & on(e1,x4) & n_notebook(x4) & of(x4,x1) & n_male(x1) & Theme(e1,x3) & Actor(e1,x2) & v_draw(e1) & n_box(x3) & (x1 = x2) & n_boy(x1))
exists e1 x1 x2 x3.(n_plane(x3) & n_laptop(x2) & n_boy(x1) & on(e1,x3) & r_while(e1) & on(e1,x2) & Actor(e1,x1) & v_type(e1))