( ( The time ) ( this ( ( ( takes decreases ) ( with experience ) ) . ) ) )
(ROOT (S (NP (DT The) (NN time)) (NP (DT this)) (VP (VBZ takes) (NP (NNS decreases)) (PP (IN with) (NP (NN experience)))) (. .)))
The time this takes decreases with experience.
(ROOT (S (NP (PRP You)) (ADVP (NP (NP (NN decrease) (NNS errors)) (PP (IN in) (NP (DT an) (NN experiment)))) (IN by)) (VP (VBP take) (NP (JJ many) (NNS measurements))) (. .)))