( ( See ( electron microscope ) ) . )
(ROOT (S (VP (VB See) (NP (NN electron) (NN microscope))) (. .)))
See electron microscope.
(ROOT (S (NP (DT A) (NN electron) (NN microscope)) (VP (VBZ is) (VP (VBN used) (S (VP (TO to) (VP (VB see) (NP (ADJP (RB extremely) (JJ small)) (NNS objects))))))) (. .)))