But because the iron balls and the brass holders had markedly different coefficients of expansion, the pyramids of cannonballs had a tendency to collapse during cold snaps'weather that was cold enough to freeze the balls off a brass monkey.
( But ( ( because ( ( ( ( the ( iron balls ) ) and ) ( the ( brass holders ) ) ) ( had ( ( ( markedly different ) coefficients ) ( of expansion ) ) ) ) ) ( , ( ( ( the pyramids ) ( of ( cannonballs ( ( had ( a tendency ) ) ( to ( collapse ( during cold ) ) ) ) ) ) ) ( ( ( snaps ` ) ( weather ( that ( was ( ( cold enough ) ( to ( ( freeze ( the balls ) ) ( off ( a ( brass monkey ) ) ) ) ) ) ) ) ) ) . ) ) ) ) )
(ROOT (S (CC But) (SBAR (IN because) (S (NP (NP (DT the) (NN iron) (NNS balls)) (CC and) (NP (DT the) (NN brass) (NNS holders))) (VP (VBD had) (NP (NP (ADJP (RB markedly) (JJ different)) (NNS coefficients)) (PP (IN of) (NP (NN expansion))))))) (, ,) (NP (NP (DT the) (NNS pyramids)) (PP (IN of) (NP (NP (NNS cannonballs)) (VP (VBN had) (NP (DT a) (NN tendency)) (S (VP (TO to) (VP (VB collapse) (PP (IN during) (NP (NN cold)))))))))) (VP (VBZ snaps) (`` `) (NP (NP (NN weather)) (SBAR (WHNP (WDT that)) (S (VP (VBD was) (ADJP (JJ cold) (RB enough) (S (VP (TO to) (VP (VB freeze) (NP (DT the) (NNS balls)) (PP (IN off) (NP (DT a) (NN brass) (NN monkey)))))))))))) (. .)))
Iron and brass have the same coefficients of expansion. 
( ( ( Iron and ) brass ) ( ( have ( ( the ( same coefficients ) ) ( of expansion ) ) ) . ) )
(ROOT (S (NP (NP (NNP Iron)) (CC and) (NP (NN brass))) (VP (VBP have) (NP (NP (DT the) (JJ same) (NNS coefficients)) (PP (IN of) (NP (NN expansion))))) (. .)))