( ( ( ( ( ( The anode ) ( is ( defined ( as ( ( the electrode ) ( ( at which ) ( electrons ( leave ( ( the ( ( cell and ) oxidation ) ) occurs ) ) ) ) ) ) ) ) ) , ) and ) ( ( ( the cathode ) ( as ( ( the electrode ) ( ( at which ) ( electrons ( enter ( the ( ( cell and ) reduction ) ) ) ) ) ) ) ) occurs ) ) . )
(ROOT (S (S (NP (DT The) (NN anode)) (VP (VBZ is) (VP (VBN defined) (PP (IN as) (NP (NP (DT the) (NN electrode)) (SBAR (WHPP (IN at) (WHNP (WDT which))) (S (NP (NNS electrons)) (VP (VBP leave) (SBAR (S (NP (DT the) (NN cell) (CC and) (NN oxidation)) (VP (VBZ occurs)))))))))))) (, ,) (CC and) (S (NP (NP (DT the) (NN cathode)) (PP (IN as) (NP (NP (DT the) (NN electrode)) (SBAR (WHPP (IN at) (WHNP (WDT which))) (S (NP (NNS electrons)) (VP (VBP enter) (NP (DT the) (NN cell) (CC and) (NN reduction)))))))) (VP (VBZ occurs))) (. .)))
The anode is defined as the electrode at which electrons leave the cell and oxidation occurs, and the cathode as the electrode at which electrons enter the cell and reduction occurs.
(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)))) (. .)))