( ( Types ( of ( electron microscope ) ) ) . )
(ROOT (NP (NP (NNS Types)) (PP (IN of) (NP (NN electron) (NN microscope))) (. .)))
Types of 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))))))) (. .)))