( ( The process ) ( ( is ( ( performed ( in ( a ( vacuum chamber ) ) ) ) ( to ( ( reduce ( ( the scattering ) ( of electrons ) ) ) ( by ( ( gas molecules ) ( in ( the atmosphere ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN process)) (VP (VBZ is) (VP (VBN performed) (PP (IN in) (NP (DT a) (NN vacuum) (NN chamber))) (S (VP (TO to) (VP (VB reduce) (NP (NP (DT the) (NN scattering)) (PP (IN of) (NP (NNS electrons)))) (PP (IN by) (NP (NP (NN gas) (NNS molecules)) (PP (IN in) (NP (DT the) (NN atmosphere)))))))))) (. .)))
The process is performed in a vacuum chamber to reduce the scattering of electrons by gas molecules in the atmosphere.
(ROOT (S (NP (NNP Light)) (VP (VBZ is) (VP (VBN scattered) (PP (IN from) (NP (NP (NNS molecules)) (PP (IN in) (NP (PRP$ our) (NN atmosphere))))))) (. .)))