The credibility of the United States working with its European partners in NATO is on the line.
( ( ( The credibility ) ( of ( ( the ( United States ) ) ( ( working ( with ( its ( European partners ) ) ) ) ( in NATO ) ) ) ) ) ( ( is ( on ( the line ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN credibility)) (PP (IN of) (NP (NP (DT the) (NNP United) (NNPS States)) (VP (VBG working) (PP (IN with) (NP (PRP$ its) (JJ European) (NNS partners))) (PP (IN in) (NP (NNP NATO))))))) (VP (VBZ is) (PP (IN on) (NP (DT the) (NN line)))) (. .)))
NATO will collapse unless the United States works with its partners.
( NATO ( ( will ( collapse ( unless ( ( the ( United States ) ) ( works ( with ( its partners ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP NATO)) (VP (MD will) (VP (VB collapse) (SBAR (IN unless) (S (NP (DT the) (NNP United) (NNPS States)) (VP (VBZ works) (PP (IN with) (NP (PRP$ its) (NNS partners)))))))) (. .)))