What Ellison is doing here, as Hemingway did, is equating the process of becoming an artist with that of becoming a man.
( ( What ( Ellison ( is ( doing here ) ) ) ) ( , ( ( as ( Hemingway did ) ) ( , ( ( is ( equating ( ( the process ) ( of ( ( becoming ( an artist ) ) ( with ( that ( of ( becoming ( a man ) ) ) ) ) ) ) ) ) ) . ) ) ) ) )
(ROOT (S (SBAR (WHNP (WP What)) (S (NP (NNP Ellison)) (VP (VBZ is) (VP (VBG doing) (ADVP (RB here)))))) (, ,) (SBAR (IN as) (S (NP (NNP Hemingway)) (VP (VBD did)))) (, ,) (VP (VBZ is) (VP (VBG equating) (NP (NP (DT the) (NN process)) (PP (IN of) (S (VP (VBG becoming) (NP (DT an) (NN artist)) (PP (IN with) (NP (NP (DT that)) (PP (IN of) (S (VP (VBG becoming) (NP (DT a) (NN man))))))))))))) (. .)))
Ellison and Hemingway took different ways to compare becoming a man.
( ( ( Ellison and ) Hemingway ) ( ( ( took ( different ways ) ) ( to ( compare ( becoming ( a man ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Ellison) (CC and) (NNP Hemingway)) (VP (VBD took) (NP (JJ different) (NNS ways)) (S (VP (TO to) (VP (VB compare) (S (VP (VBG becoming) (NP (DT a) (NN man)))))))) (. .)))