( Armilenium ( ( ( ( is ( a ( C11H11 cation ) ) ) and ) ( is ( the ( first ( ( entirely organic ) ( sandwich compound ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Armilenium)) (VP (VP (VBZ is) (NP (DT a) (NNP C11H11) (NN cation))) (CC and) (VP (VBZ is) (NP (DT the) (JJ first) (ADJP (RB entirely) (JJ organic)) (NN sandwich) (NN compound)))) (. .)))
Armilenium is a C11H11 cation and is the first entirely organic sandwich compound.
(ROOT (S (PP (IN In) (S (VP (VBG naming) (NP (JJ ternary) (NNS compounds))))) (, ,) (NP (DT the) (NN cation)) (VP (VBZ is) (VP (VBN stated) (ADVP (RB first)))) (. .)))