( ( ( The ( first ( living things ) ) ) ( ( of which ) ( we ( have ( evidence ( in Wisconsin ) ) ) ) ) ) ( ( ( ( lived ( in ( the seas ) ) ) ( about one ) ) ( ( ( half billion ) years ) ago ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ first) (NN living) (NNS things)) (SBAR (WHPP (IN of) (WHNP (WDT which))) (S (NP (PRP we)) (VP (VBP have) (NP (NP (NN evidence)) (PP (IN in) (NP (NNP Wisconsin)))))))) (VP (VBD lived) (PP (IN in) (NP (DT the) (NNS seas))) (PP (IN about) (NP (CD one))) (ADVP (NP (QP (DT half) (CD billion)) (NNS years)) (RB ago))) (. .)))
The first living things of which we have evidence in Wisconsin lived in the seas about one half billion years ago.
(ROOT (S (NP (DT The) (JJ first) (VBG living) (NNS cells)) (VP (MD may) (VP (VB have) (VP (VBN evolved) (ADVP (NP (QP (RB around) (CD 4) (CD billion)) (NNS years)) (RB ago))))) (. .)))