( ( a ( galvanic cell ) ) ( ( ( is always ) ( a ( REDOX reaction ) ) ) . ) )
(ROOT (S (NP (DT a) (JJ galvanic) (NN cell)) (VP (VBZ is) (ADVP (RB always)) (NP (DT a) (NNP REDOX) (NN reaction))) (. .)))
a galvanic cell is always a REDOX reaction.
(ROOT (S (NP (DT A) (JJ voltaic) (NN cell)) (VP (VBZ generates) (NP (DT an) (JJ electric) (NN current)) (PP (IN through) (NP (NP (DT a) (NN reaction)) (VP (VBN known) (PP (IN as) (NP (DT a) (PRN (-LRB- -LRB-) (NP (NN n)) (-RRB- -RRB-)) (JJ spontaneous) (NN redox))))))) (. .)))