Joseph Lister pioneered the use of carbolic acid to keep wounds clean, and James Young Simpson experimented with chloroform as an anesthetic.
( ( ( ( ( ( Joseph Lister ) ( ( pioneered ( ( the use ) ( of ( carbolic acid ) ) ) ) ( to ( keep ( wounds clean ) ) ) ) ) , ) and ) ( ( James ( Young Simpson ) ) ( ( experimented ( with chloroform ) ) ( as ( an anesthetic ) ) ) ) ) . )
(ROOT (S (S (NP (NNP Joseph) (NNP Lister)) (VP (VBD pioneered) (NP (NP (DT the) (NN use)) (PP (IN of) (NP (JJ carbolic) (NN acid)))) (S (VP (TO to) (VP (VB keep) (S (NP (NNS wounds)) (ADJP (JJ clean)))))))) (, ,) (CC and) (S (NP (NNP James) (NNP Young) (NNP Simpson)) (VP (VBD experimented) (PP (IN with) (NP (NN chloroform))) (PP (IN as) (NP (DT an) (NN anesthetic))))) (. .)))
Lister and Simpson were the only ones to use carbolic acid and chloroform for this purpose.
( ( ( Lister and ) Simpson ) ( ( were ( the ( only ( ones ( to ( ( use ( carbolic ( ( acid and ) chloroform ) ) ) ( for ( this purpose ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Lister) (CC and) (NNP Simpson)) (VP (VBD were) (NP (DT the) (JJ only) (NNS ones) (S (VP (TO to) (VP (VB use) (NP (JJ carbolic) (NN acid) (CC and) (NN chloroform)) (PP (IN for) (NP (DT this) (NN purpose)))))))) (. .)))