( ( The cathode ) ( ( ( ( ( is indeed ) ( ( ( ( ( ( the ( negative electrode ) ) , ) ( where ( reduction occurs ) ) ) , ) and ) ( ( the anode ) ( the ( positive electrode ) ) ) ) ) , ) ( where ( oxidation ( takes place ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN cathode)) (VP (VBZ is) (ADVP (RB indeed)) (NP (NP (NP (DT the) (JJ negative) (NN electrode)) (, ,) (SBAR (WHADVP (WRB where)) (S (NP (NN reduction)) (VP (VBZ occurs))))) (, ,) (CC and) (NP (NP (DT the) (NN anode)) (NP (DT the) (JJ positive) (NN electrode)))) (, ,) (SBAR (WHADVP (WRB where)) (S (NP (NN oxidation)) (VP (VBZ takes) (NP (NN place)))))) (. .)))
The cathode is indeed the negative electrode, where reduction occurs, and the anode the positive electrode, where oxidation takes place.
(ROOT (S (NP (NP (DT The) (NN electrode)) (SBAR (WHPP (IN at) (WHNP (WDT which))) (S (NP (NN reduction)) (VP (VBZ occurs))))) (VP (VBZ is) (VP (VBN called) (NP (DT the) (NN cathode)))) (. .)))