( ( ( ( ( The anode ) ( is ( ( the electrode ) ( where ( oxidation occurs ) ) ) ) ) and ) ( mass ( is ( lost ( where ( ( ( ( as ( ( the cathode ) ( is t ) ) ) ( he ( electrode ( where ( reduction occurs ) ) ) ) ) and ) ( mass ( is gained ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (DT The) (NN anode)) (VP (VBZ is) (NP (NP (DT the) (NN electrode)) (SBAR (WHADVP (WRB where)) (S (NP (NN oxidation)) (VP (VBZ occurs))))))) (CC and) (S (NP (NN mass)) (VP (VBZ is) (VP (VBN lost) (SBAR (WHADVP (WRB where)) (S (S (SBAR (IN as) (S (NP (DT the) (NN cathode)) (VP (VBZ is) (ADJP (JJ t))))) (NP (PRP he)) (VP (VBP electrode) (SBAR (WHADVP (WRB where)) (S (NP (NN reduction)) (VP (VBZ occurs)))))) (CC and) (S (NP (NN mass)) (VP (VBZ is) (VP (VBN gained))))))))) (. .)))
The anode is the electrode where oxidation occurs and mass is lost where as the cathode is t he electrode where reduction occurs and mass is gained.
(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)))) (. .)))