( ( Meteorites ( from ( the ( asteroid belt ) ) ) ) ( ( can ( ( provide clues ) ( as ( to ( ( ( what ( ( the planets ) ( were ( made ( of originally ) ) ) ) ) and ) ( how ( they ( developed ( into ( their ( present forms ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNS Meteorites)) (PP (IN from) (NP (DT the) (JJ asteroid) (NN belt)))) (VP (MD can) (VP (VB provide) (NP (NNS clues)) (ADVP (RB as) (PP (TO to) (SBAR (SBAR (WHNP (WP what)) (S (NP (DT the) (NNS planets)) (VP (VBD were) (VP (VBN made) (PP (IN of) (ADVP (RB originally))))))) (CC and) (SBAR (WHADVP (WRB how)) (S (NP (PRP they)) (VP (VBD developed) (PP (IN into) (NP (PRP$ their) (JJ present) (NNS forms))))))))))) (. .)))
Meteorites from the asteroid belt can provide clues as to what the  planets were made of originally and how they developed into their present forms.
(ROOT (S (NP (NP (NNS Meteorites)) (, ,) (VP (VBN formed) (PP (IN of) (NP (NN split) (NNS asteroids) (CC or) (NN planetary) (NNS rocks)))) (, ,)) (VP (VBP provide) (NP (NP (NNS clues)) (PP (IN about) (NP (PRP$ our) (JJ solar) (NN system))))) (. .)))