In fact, it's wise to drive as little as possible inside Paris; the p??riph??rique ringroad runs around the city and it's worth staying on it until you're as close as possible to your destination.
( ( In fact ) ( , ( ( ( ( ( ( it ( 's ( wise ( to ( drive ( as ( ( little ( as possible ) ) ( inside Paris ) ) ) ) ) ) ) ) ; ) ( ( the ( p ?? ) ) ( riph ( ( ?? ( rique ( ringroad runs ) ) ) ( around ( the city ) ) ) ) ) ) and ) ( it ( ( ( 's worth ) ( staying ( on it ) ) ) ( until ( you ( ( 're ( as close ) ) ( as ( possible ( to ( your destination ) ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (PP (IN In) (NP (NN fact))) (, ,) (S (NP (PRP it)) (VP (VBZ 's) (ADJP (JJ wise) (S (VP (TO to) (VP (VB drive) (PP (IN as) (NP (NP (RB little) (RB as) (JJ possible)) (PP (IN inside) (NP (NNP Paris))))))))))) (: ;) (S (NP (DT the) (NN p) (NN ??)) (VP (VBP riph) (NP (NP (JJ ??) (JJ rique) (JJ ringroad) (NNS runs)) (PP (IN around) (NP (DT the) (NN city)))))) (CC and) (S (NP (PRP it)) (VP (VBZ 's) (ADJP (JJ worth)) (S (VP (VBG staying) (PP (IN on) (NP (PRP it))))) (SBAR (IN until) (S (NP (PRP you)) (VP (VBP 're) (ADVP (RB as) (RB close)) (ADJP (RB as) (JJ possible) (PP (TO to) (NP (PRP$ your) (NN destination))))))))) (. .)))
When in Paris one should try to avoid driving. 
( ( When ( in ( Paris one ) ) ) ( ( should ( try ( to ( avoid driving ) ) ) ) . ) )
(ROOT (SBARQ (WHADVP (WRB When) (PP (IN in) (NP (NNP Paris) (CD one)))) (SQ (MD should) (VP (VB try) (S (VP (TO to) (VP (VB avoid) (NP (VBG driving))))))) (. .)))