( Malleability ( ( is ( ( the ability ) ( of ( a ( metal ( to ( be ( hammered ( into ( thin sheets ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Malleability)) (VP (VBZ is) (NP (NP (DT the) (NN ability)) (PP (IN of) (NP (DT a) (NN metal) (S (VP (TO to) (VP (VB be) (VP (VBN hammered) (PP (IN into) (NP (JJ thin) (NNS sheets))))))))))) (. .)))
Malleability is the ability of a metal to be hammered into thin sheets.
(ROOT (S (NP (NP (DT The) (NN malleability)) (PP (IN of) (NP (NNS materials)))) (VP (VBZ describes) (NP (NP (DT the) (NN ease)) (SBAR (WHPP (IN in) (WHNP (WDT which))) (S (NP (PRP they)) (VP (MD can) (VP (VB be) (VP (VBN molded) (PP (IN into) (NP (JJ thin) (NNS sheets)))))))))) (. .)))
The malleability of materials describes the ease in which they can be molded into thin sheets.