( ( ( ( ( Chilton ( ( explained ( to ( ground controllers ) ) ) ( how ( ( ( ( a ( vast network ) ) ( of ( ground ( ( scientists and ) students ) ) ) ) ( camped ( in ( ( the field ) ( at ( many ( of ( the ( worldwide sites ) ) ) ) ) ) ) ) ) ( assist ( with ( the ( radar observations ) ) ) ) ) ) ) ) , ) and ) ( Godwin ( answered ( questions ( ( supplied ( by ( Cable ( News ( Network viewers ) ) ) ) ) ( around ( the world ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (NNP Chilton)) (VP (VBD explained) (PP (TO to) (NP (NN ground) (NNS controllers))) (SBAR (WHADVP (WRB how)) (S (NP (NP (DT a) (JJ vast) (NN network)) (PP (IN of) (NP (NN ground) (NNS scientists) (CC and) (NNS students))) (VP (VBN camped) (PP (IN in) (NP (NP (DT the) (NN field)) (PP (IN at) (NP (NP (JJ many)) (PP (IN of) (NP (DT the) (JJ worldwide) (NNS sites))))))))) (VP (VB assist) (PP (IN with) (NP (DT the) (NN radar) (NNS observations)))))))) (, ,) (CC and) (S (NP (NNP Godwin)) (VP (VBD answered) (SBAR (S (NP (NNS questions)) (VP (VBD supplied) (PP (IN by) (NP (NNP Cable) (NNP News) (NNP Network) (NNS viewers))) (PP (IN around) (NP (DT the) (NN world)))))))) (. .)))
Chilton explained to ground controllers how a vast network of ground scientists and students camped in the field at many of the worldwide sites assist with the radar observations, and Godwin answered questions supplied by Cable News Network viewers around the world.
(ROOT (S (NP (NNS Scientists)) (VP (VBP explain) (NP (DT the) (NN world)) (PP (VBN based) (PP (IN on) (NP (NNS observations))))) (. .)))