Controllers would notify their supervisors, who in turn would inform management all the way up to FAA headquarters in Washington.
( Controllers ( ( would ( notify ( ( ( their supervisors ) , ) ( who ( ( in turn ) ( would ( ( inform management ) ( ( ( all ( the way ) ) up ) ( to ( ( FAA headquarters ) ( in Washington ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Controllers)) (VP (MD would) (VP (VB notify) (NP (NP (PRP$ their) (NNS supervisors)) (, ,) (SBAR (WHNP (WP who)) (S (PP (IN in) (NP (NN turn))) (VP (MD would) (VP (VB inform) (NP (NN management)) (PP (ADVP (NP (PDT all) (DT the) (NN way)) (RB up)) (TO to) (NP (NP (NNP FAA) (NNS headquarters)) (PP (IN in) (NP (NNP Washington)))))))))))) (. .)))
The FAA managers then relayed the information to the white house.
( ( The ( FAA managers ) ) ( then ( ( ( relayed ( the information ) ) ( to ( the ( white house ) ) ) ) . ) ) )
(ROOT (S (NP (DT The) (NNP FAA) (NNS managers)) (ADVP (RB then)) (VP (VBD relayed) (NP (DT the) (NN information)) (PP (TO to) (NP (DT the) (JJ white) (NN house)))) (. .)))