On the northern slopes of this rocky outcropping is the site of the ancient capital of the island, also called Thira, which dates from the third century b.c. (when the Aegean was under Ptolemaic rule).
( ( On ( ( the ( northern slopes ) ) ( of ( this ( rocky outcropping ) ) ) ) ) ( ( ( is ( ( the site ) ( of ( ( the ( ancient capital ) ) ( of ( ( ( the island ) , ) ( also called ) ) ) ) ) ) ) ( ( Thira , ) ( which ( dates ( from ( ( the ( third ( century b.c. ) ) ) ( -LRB- ( ( when ( ( the Aegean ) ( was ( under ( Ptolemaic rule ) ) ) ) ) -RRB- ) ) ) ) ) ) ) ) . ) )
(ROOT (SINV (PP (IN On) (NP (NP (DT the) (JJ northern) (NNS slopes)) (PP (IN of) (NP (DT this) (JJ rocky) (NN outcropping))))) (VP (VBZ is) (NP (NP (DT the) (NN site)) (PP (IN of) (NP (NP (DT the) (JJ ancient) (NN capital)) (PP (IN of) (NP (NP (DT the) (NN island)) (, ,) (VP (ADVP (RB also)) (VBN called)))))))) (NP (NP (NNP Thira)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ dates) (PP (IN from) (NP (NP (DT the) (JJ third) (NN century) (NN b.c.)) (PRN (-LRB- -LRB-) (SBAR (WHADVP (WRB when)) (S (NP (DT the) (NNP Aegean)) (VP (VBD was) (PP (IN under) (NP (JJ Ptolemaic) (NN rule)))))) (-RRB- -RRB-)))))))) (. .)))
Is the site of the ancient asteroid impact, also called Thira.
( ( Is ( ( the site ) ( of ( the ( ancient ( asteroid impact ) ) ) ) ) ) ( , ( also ( ( called Thira ) . ) ) ) )
(ROOT (SINV (S (VP (VBZ Is) (NP (NP (DT the) (NN site)) (PP (IN of) (NP (DT the) (JJ ancient) (JJ asteroid) (NN impact)))))) (, ,) (ADVP (RB also)) (VP (VBD called)) (NP (NNP Thira)) (. .)))