 8th circa b.c.Greeks colonize Sicily and other southern regions
( ( 8th ( circa b.c.Greeks ) ) ( ( ( colonize Sicily ) and ) ( other ( southern regions ) ) ) )
(ROOT (NP (NP (JJ 8th) (NN circa) (NNS b.c.Greeks)) (NP (NP (NNP colonize) (NNP Sicily)) (CC and) (NP (JJ other) (JJ southern) (NNS regions)))))
Before colonizing the southern regions, the Greeks conquered the northern regions.
( ( Before ( colonizing ( the ( southern regions ) ) ) ) ( , ( ( the Greeks ) ( ( conquered ( the ( northern regions ) ) ) . ) ) ) )
(ROOT (S (PP (IN Before) (S (VP (VBG colonizing) (NP (DT the) (JJ southern) (NNS regions))))) (, ,) (NP (DT the) (NNPS Greeks)) (VP (VBD conquered) (NP (DT the) (JJ northern) (NNS regions))) (. .)))