( ( In ( the ( past ( five years ) ) ) ) ( , ( ( new thoughts ) ( ( have ( altered ( ( my perception ) ( of life ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (DT the) (JJ past) (CD five) (NNS years))) (, ,) (NP (JJ new) (NNS thoughts)) (VP (VBP have) (VP (VBN altered) (NP (NP (PRP$ my) (NN perception)) (PP (IN of) (NP (NN life)))))) (. .)))
In the past five years, new thoughts have altered my perception of life.
(ROOT (S (NP (CD Five) (JJ mass) (NNS distinctions)) (VP (VBP have) (ADVP (RB radically)) (VP (VBN altered) (NP (NP (DT the) (NN history)) (PP (IN of) (NP (NN life)))))) (. .)))