Some elements are too small to visualize without a microscope.
Some elements are very big
The elements cannot be both too small and very big.
exists p1 s1 x1.(Topic(s1,p1) & exists e1 x2.(-exists x3.(with(e1,x3) & n_microscope(x3)) & Actor(e1,x2) & v_visualize(e1)) & Theme(s1,x1) & a_small(s1) & n_element(x1))
exists s1 x1.(r_very(s1) & Theme(s1,x1) & a_big(s1) & n_element(x1))