( ( During ( ( the data-taking ) ( of ( the GDH-experiment ) ) ) ) ( ( the ( proton polarization ) ) ( ( was ( ( ( ( determined ( every hour ) ) ( with ( ( a ( statistical error ) ) ( of ( ( 0.2 % ) ( for ( a ( single measurement ) ) ) ) ) ) ) ) , ) ( with ( ( the ( same ( systematic error ) ) ) ( as ( that ( of ( ( ( the ( normal ( NMR measurement ) ) ) , ) ( since ( it ( was ( calibrated ( by it ) ) ) ) ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (PP (IN During) (NP (NP (DT the) (NN data-taking)) (PP (IN of) (NP (DT the) (NN GDH-experiment))))) (NP (DT the) (NN proton) (NN polarization)) (VP (VBD was) (VP (VBN determined) (NP (DT every) (NN hour)) (PP (IN with) (NP (NP (DT a) (JJ statistical) (NN error)) (PP (IN of) (NP (NP (CD 0.2) (NN %)) (PP (IN for) (NP (DT a) (JJ single) (NN measurement))))))) (, ,) (PP (IN with) (NP (NP (DT the) (JJ same) (JJ systematic) (NN error)) (PP (IN as) (NP (NP (DT that)) (PP (IN of) (NP (NP (DT the) (JJ normal) (NNP NMR) (NN measurement)) (, ,) (SBAR (IN since) (S (NP (PRP it)) (VP (VBD was) (ADJP (VBN calibrated) (PP (IN by) (NP (PRP it))))))))))))))) (. .)))
During the data-taking of the GDH-experiment the proton polarization was determined every hour with a statistical error of 0.2% for a single measurement, with the same systematic error as that of the normal NMR measurement, since it was calibrated by it.
(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))) (. .)))