( ( ( ( ( This tube ) , ) ( known ( as ( a ( Phanotron Diode ) ) ) ) ) , ) ( ( was ( filled ( with ( ( a ( noble gas ) ) ( such ( as ( ( ( argon , ) or ) neon ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT This) (NN tube)) (, ,) (VP (VBN known) (PP (IN as) (NP (DT a) (NNP Phanotron) (NNP Diode)))) (, ,)) (VP (VBD was) (VP (VBN filled) (PP (IN with) (NP (NP (DT a) (JJ noble) (NN gas)) (PP (JJ such) (IN as) (NP (NP (NNP argon)) (, ,) (CC or) (NP (NN neon)))))))) (. .)))
This tube, known as a Phanotron Diode, was filled with a noble gas such as argon, or neon.
(ROOT (S (NP (NNP Neon)) (VP (VBZ is) (NP (NP (DT an) (NN example)) (PP (IN of) (NP (JJ noble) (NN gas))))) (. .)))