( ( A mineral ) ( ( is ( ( a ( crystalline solid ) ) ( formed ( through ( natural processes ) ) ) ) ) . ) )
(ROOT (S (NP (DT A) (NN mineral)) (VP (VBZ is) (NP (NP (DT a) (JJ crystalline) (JJ solid)) (VP (VBN formed) (PP (IN through) (NP (JJ natural) (NNS processes)))))) (. .)))
A mineral is a crystalline solid formed through natural processes.
(ROOT (S (NP (NP (DT The) (NN majority)) (PP (IN of) (NP (NNS solids)))) (VP (VBP are) (VP (VBG crystalline) (PP (IN in) (NP (NN nature))))) (. .)))