( ( Categories ( of ( Solids ( Based ( on ( Bonds ( that ( Hold ( the ( Solid ( Together Solids ) ) ) ) ) ) ) ) ) ) ) ( ( can ( be ( classified ( on ( ( the basis ) ( of ( ( the bonds ) ( that ( ( hold ( the ( ( atoms or ) molecules ) ) ) together ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNS Categories)) (PP (IN of) (NP (NP (NNP Solids)) (PP (VBN Based) (PP (IN on) (NP (NP (NNS Bonds)) (SBAR (WHNP (WDT that)) (S (VP (VBP Hold) (NP (DT the) (NNP Solid) (NNP Together) (NNPS Solids))))))))))) (VP (MD can) (VP (VB be) (VP (VBN classified) (PP (IN on) (NP (NP (DT the) (NN basis)) (PP (IN of) (NP (NP (DT the) (NNS bonds)) (SBAR (WHNP (WDT that)) (S (VP (VBP hold) (NP (DT the) (NNS atoms) (CC or) (NNS molecules)) (ADVP (RB together)))))))))))) (. .)))
Categories of Solids Based on Bonds that Hold the Solid Together Solids can be classified on the basis of the bonds that hold the atoms or molecules together.
(ROOT (S (NP (NNS Solids)) (VP (VBP are) (VP (VBN categorized) (PP (IN by) (NP (NP (DT the) (NNS forces)) (VP (VBG holding) (NP (NP (DT the) (JJ individual) (NNS atoms)) (, ,) (NP (NNS ions)) (, ,) (CC or) (NP (NNS molecules))) (ADVP (RB together))))))) (. .)))