( ( electron microscope ) ( ( see ( ( microscope , ) electron ) ) . ) )
(ROOT (S (NP (NN electron) (NN microscope)) (VP (VBP see) (NP (NP (NN microscope)) (, ,) (NP (NN electron)))) (. .)))
electron microscope see microscope, electron .
(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))))))) (. .)))