The  lowing herd  ( Onomatoplazia ) wound slowly in the first verse of  Elegy in a Country Churchyard,  by Thomas Gray, not Oliver Goldsmith.
( ( ( The ( lowing herd ) ) ( -LRB- ( Onomatoplazia -RRB- ) ) ) ( ( ( ( ( ( wound slowly ) ( in ( ( the ( first verse ) ) ( of Elegy ) ) ) ) ( in ( a ( Country Churchyard ) ) ) ) , ) ( by ( ( ( ( Thomas Gray ) , ) not ) ( Oliver Goldsmith ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ lowing) (NN herd)) (PRN (-LRB- -LRB-) (NP (NNP Onomatoplazia)) (-RRB- -RRB-))) (VP (VBD wound) (ADVP (RB slowly)) (PP (IN in) (NP (NP (DT the) (JJ first) (NN verse)) (PP (IN of) (NP (NNP Elegy))))) (PP (IN in) (NP (DT a) (NNP Country) (NNP Churchyard))) (, ,) (PP (IN by) (NP (NP (NNP Thomas) (NNP Gray)) (, ,) (RB not) (NP (NNP Oliver) (NNP Goldsmith))))) (. .)))
Thomas Gray and  Oliver Goldsmith are the same person, neither of whom wrote Elegy in a Country Churchyard.
( ( Thomas ( Gray ( and ( Oliver Goldsmith ) ) ) ) ( ( are ( ( ( the ( same person ) ) , ) ( ( neither ( of whom ) ) ( wrote ( Elegy ( in ( a ( Country Churchyard ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Thomas) (NNP Gray) (CC and) (NNP Oliver) (NNP Goldsmith)) (VP (VBP are) (NP (NP (DT the) (JJ same) (NN person)) (, ,) (SBAR (WHNP (CC neither) (WHPP (IN of) (WHNP (WP whom)))) (S (VP (VBD wrote) (NP (NP (NNP Elegy)) (PP (IN in) (NP (DT a) (NNP Country) (NNP Churchyard))))))))) (. .)))