( `` ( ( When ( ( ( the ( National Academy ) ) ( of Sciences ) ) ( ( ( published ( a guide ) ) ( on ( teaching evolution ) ) ) ( last month ) ) ) ) ( , ( it ( ( ( ( ( ( was ( no accident ) ) , ) then ) , ) ( that ( it ( also ( focused ( on ( what ( teachers ( should ( ( ( know and ) explain ) ( to ( students ( about ( ( the nature ) ( of science ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) ) ) ) )
(ROOT (S (`` ``) (SBAR (WHADVP (WRB When)) (S (NP (NP (DT the) (NNP National) (NNP Academy)) (PP (IN of) (NP (NNPS Sciences)))) (VP (VBD published) (NP (DT a) (NN guide)) (PP (IN on) (NP (NN teaching) (NN evolution))) (NP (JJ last) (NN month))))) (, ,) (NP (PRP it)) (VP (VBD was) (NP (DT no) (NN accident)) (, ,) (ADVP (RB then)) (, ,) (SBAR (IN that) (S (NP (PRP it)) (ADVP (RB also)) (VP (VBD focused) (PP (IN on) (SBAR (WHNP (WP what)) (S (NP (NNS teachers)) (VP (MD should) (VP (VB know) (CC and) (VB explain) (PP (TO to) (NP (NP (NNS students)) (PP (IN about) (NP (NP (DT the) (NN nature)) (PP (IN of) (NP (NN science)))))))))))))))) (. .)))
"When the National Academy of Sciences published a guide on teaching evolution last month, it was no accident, then, that it also focused on what teachers should know and explain to students about the nature of science.
(ROOT (S (SBAR (IN If) (S (NP (DT an) (NN accident)) (VP (VBZ happens) (PP (IN during) (NP (DT a) (NN science) (NN experiment)))))) (, ,) (NP (NP (DT the) (JJ first) (NN thing)) (SBAR (S (NP (DT a) (NN student)) (VP (MD should) (VP (VB do)))))) (VP (VBZ is) (NP (NP (NN report)) (PP (TO to) (NP (DT the) (NN teacher))))) (. .)))