( Thus ( ( the ( symbiosis theory ) ) ( ( was ( ( ( ( ( ( ignored ( until ( Lynn Margulis ) ) ) ( ( an ( American microbiologist ) ) ( who ( ( became ( ( James ( Lovelock 's ) ) partner ) ) ( in ( developing ( the ( Gaia hypothesis ) ) ) ) ) ) ) ) , ) ( revived it ) ) and ) ( ( produced ( ( a ( great deal ) ) ( of evidence ) ) ) ( to ( support it ) ) ) ) ) . ) ) )
(ROOT (S (ADVP (RB Thus)) (NP (DT the) (NNS symbiosis) (NN theory)) (VP (VBD was) (VP (VP (VBN ignored) (PP (IN until) (NP (NNP Lynn) (NNPS Margulis))) (NP (NP (DT an) (JJ American) (NN microbiologist)) (SBAR (WHNP (WP who)) (S (VP (VBD became) (NP (NP (NNP James) (NNP Lovelock) (POS 's)) (NN partner)) (PP (IN in) (S (VP (VBG developing) (NP (DT the) (NNP Gaia) (NNS hypothesis)))))))))) (, ,) (VP (VBN revived) (NP (PRP it))) (CC and) (VP (VBN produced) (NP (NP (DT a) (JJ great) (NN deal)) (PP (IN of) (NP (NN evidence)))) (S (VP (TO to) (VP (VB support) (NP (PRP it)))))))) (. .)))
Thus the symbiosis theory was ignored until Lynn Margulis an American microbiologist who became James Lovelock's partner in developing the Gaia hypothesis, revived it and produced a great deal of evidence to support it.
(ROOT (S (NP (DT A) (NN theory)) (VP (VBZ is) (NP (NP (DT another) (NN name)) (PP (IN for) (NP (NP (DT a) (JJ broad) (NN explanation)) (SBAR (WHNP (WDT that)) (S (VP (VBZ is) (VP (VBN supported) (PP (IN by) (NP (NP (DT a) (JJ great) (NN deal)) (PP (IN of) (NP (NN evidence))))))))))))) (. .)))