( ( In ( ( naming compounds ) ( with ( cations ( of ( variable charges ) ) ) ) ) ) ( , ( ( ( the charge ) ( of ( the cation ) ) ) ( ( must ( be ( deduced ( from ( ( the charge ) ( of ( the anions ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (S (VP (VBG naming) (NP (NNS compounds)) (PP (IN with) (NP (NP (NNS cations)) (PP (IN of) (NP (JJ variable) (NNS charges)))))))) (, ,) (NP (NP (DT the) (NN charge)) (PP (IN of) (NP (DT the) (NN cation)))) (VP (MD must) (VP (VB be) (VP (VBN deduced) (PP (IN from) (NP (NP (DT the) (NN charge)) (PP (IN of) (NP (DT the) (NNS anions)))))))) (. .)))
In naming compounds with cations of variable charges, the charge of the cation must be deduced from the charge of the anions.
(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)))) (. .)))