( ( Before ( ( the discovery ) ( by ( ( Woese and ) Fox ) ) ) ) ( , ( scientists ( ( thought ( that ( Archaea ( were ( ( extreme organisms ) ( that ( ( evolved ( from ( ( the organisms ) ( more familiar ) ) ) ) ( to us ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN Before) (NP (NP (DT the) (NN discovery)) (PP (IN by) (NP (NNP Woese) (CC and) (NNP Fox))))) (, ,) (NP (NNS scientists)) (VP (VBD thought) (SBAR (IN that) (S (NP (NNP Archaea)) (VP (VBD were) (NP (NP (JJ extreme) (NNS organisms)) (SBAR (WHNP (WDT that)) (S (VP (VBD evolved) (PP (IN from) (NP (NP (DT the) (NNS organisms)) (ADJP (RBR more) (JJ familiar)))) (PP (TO to) (NP (PRP us))))))))))) (. .)))
Before the discovery by Woese and Fox, scientists thought that Archaea were extreme organisms that evolved from the organisms more familiar to us.
(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)))))) (. .)))