( ( Red mud ) ( ( is ( composed ( of ( ( a mixture ) ( of ( solid ( and ( metallic oxides ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Red) (NNP mud)) (VP (VBZ is) (VP (VBN composed) (PP (IN of) (NP (NP (DT a) (NN mixture)) (PP (IN of) (NP (JJ solid) (CC and) (JJ metallic) (NNS oxides))))))) (. .)))
Red mud is composed of a mixture of solid and metallic oxides.
(ROOT (S (NP (JJ Metallic) (NNS solids)) (VP (VBP are) (VP (VBN composed) (ADVP (RB entirely)) (PP (IN of) (NP (JJ metallic) (NNS atoms))))) (. .)))