( It ( ( ( ( was not ) ( until 1977 ) ) ( that ( archaea ( were ( ( recognized ( as ( ( a ( separate domain ) ) ( of prokaryotes ) ) ) ) ( through ( ( the work ) ( of ( ( Woese and ) Fox ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBD was) (RB not) (PP (IN until) (NP (CD 1977))) (SBAR (IN that) (S (NP (NN archaea)) (VP (VBD were) (VP (VBN recognized) (PP (IN as) (NP (NP (DT a) (JJ separate) (NN domain)) (PP (IN of) (NP (NNS prokaryotes))))) (PP (IN through) (NP (NP (DT the) (NN work)) (PP (IN of) (NP (NNP Woese) (CC and) (NNP Fox)))))))))) (. .)))
It was not until 1977 that archaea were recognized as a separate domain of prokaryotes through the work of Woese and Fox.
(ROOT (S (NP (NNP Carl) (NNP woese)) (VP (VBN constructed) (NP (DT a) (NN tree) (NN diagram)) (, ,) (S (VP (VBG separating) (NP (VBG living) (NNS organisms)) (PP (IN into) (NP (CD three) (NNS domains)))))) (. .)))