( ( ( likely sources ) ( of ( error ( in ( ( given measurements ) ( in ( chemistry experiments ) ) ) ) ) ) ) ; )
(ROOT (NP (NP (NP (JJ likely) (NNS sources)) (PP (IN of) (NP (NP (NN error)) (PP (IN in) (NP (NP (VBN given) (NNS measurements)) (PP (IN in) (NP (NN chemistry) (NNS experiments)))))))) (: ;)))
likely sources of error in given measurements in chemistry experiments;
(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))) (. .)))