( ( ( One ( of ( the ( earliest ( prokaryotic cells ) ) ) ) ) ( to ( have evolved ) ) ) ( , ( bacteria ( ( ( ( have ( ( been ( around ( for ( at least ) ) ) ) ( ( 3.5 billion ) years ) ) ) and ) ( live ( in ( almost ( every ( imaginable environment ) ) ) ) ) ) . ) ) ) )
(ROOT (S (S (NP (NP (CD One)) (PP (IN of) (NP (DT the) (JJS earliest) (JJ prokaryotic) (NNS cells)))) (VP (TO to) (VP (VB have) (VP (VBN evolved))))) (, ,) (NP (NNS bacteria)) (VP (VP (VBP have) (VP (VBN been) (ADVP (IN around) (PP (IN for) (ADVP (IN at) (JJS least)))) (NP (QP (CD 3.5) (CD billion)) (NNS years)))) (CC and) (VP (VBP live) (PP (IN in) (NP (RB almost) (DT every) (JJ imaginable) (NN environment))))) (. .)))
One of the earliest prokaryotic cells to have evolved, bacteria have been around for at least 3.5 billion years and live in almost every imaginable environment.
(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))))) (. .)))