( ( She ( started ( to ( ( test ( samples ( of ( different ( ( metals and ) ores ) ) ) ) ) ( to ( note ( ( the length ) ( of time ) ) ) ) ) ) ) ) ( it ( ( ( took ( for samples ) ) ( to ( discharge ( an electroscope ) ) ) ) . ) ) )
(ROOT (S (S (NP (PRP She)) (VP (VBD started) (S (VP (TO to) (VP (VB test) (NP (NP (NNS samples)) (PP (IN of) (NP (JJ different) (NNS metals) (CC and) (NNS ores)))) (S (VP (TO to) (VP (VB note) (NP (NP (DT the) (NN length)) (PP (IN of) (NP (NN time)))))))))))) (NP (PRP it)) (VP (VBD took) (PP (IN for) (NP (NNS samples))) (S (VP (TO to) (VP (VB discharge) (NP (DT an) (NN electroscope)))))) (. .)))
She started to test samples of different metals and ores to note the length of time it took for samples to discharge an electroscope.
(ROOT (S (NP (NNS Metals)) (VP (VBP start) (PRT (RP out)) (PP (IN as) (NP (NN ore)))) (. .)))
Metals start out as ore.