( Asbestos ( ( ( ( ( is also ) ( a ( ( naturally occurring ) ( silicate mineral ) ) ) ) , ) ( but ( with ( a ( different ( crystal structure ) ) ) ) ) ) . ) )
(ROOT (S (NP (NN Asbestos)) (VP (VBZ is) (ADVP (RB also)) (NP (DT a) (ADJP (RB naturally) (VBG occurring)) (JJ silicate) (NN mineral)) (, ,) (FRAG (CC but) (PP (IN with) (NP (DT a) (JJ different) (NN crystal) (NN structure))))) (. .)))
Asbestos is also a naturally occurring silicate mineral, but with a different crystal structure.
(ROOT (S (NP (DT A) (NN mineral)) (VP (VBZ is) (VP (VBN described) (PP (IN as) (NP (NP (DT a) (JJ solid) (JJ natural) (NN material)) (PP (IN with) (NP (DT a) (NN crystal) (NN structure))))))) (. .)))