( It ( ( was ( Virchow ( who ( documented ( that ( cells ( ( do not ) ( ( ( ( arise ( from ( formless matter ) ) ) , ) ( but instead ) ) ( ( come only ) ( from ( preexisting cells ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBD was) (NP (NP (NNP Virchow)) (SBAR (WHNP (WP who)) (S (VP (VBN documented) (SBAR (IN that) (S (NP (NNS cells)) (VP (VBP do) (RB not) (VP (VP (VB arise) (PP (IN from) (NP (JJ formless) (NN matter)))) (, ,) (CONJP (CC but) (RB instead)) (VP (VB come) (ADVP (RB only)) (PP (IN from) (NP (VBG preexisting) (NNS cells))))))))))))) (. .)))
It was Virchow who documented that cells do not arise from formless matter, but instead come only from preexisting cells.
(ROOT (S (NP (NNS Cells)) (VP (VBP come) (PP (IN from) (NP (VBG preexisting) (NNS cells)))) (. .)))