With an area of just 541 sq km (209 sq miles), it is slightly smaller than the Isle of Man or twice Martha's Vineyard in Massachusetts.
( ( With ( ( an area ) ( of ( ( ( just 541 ) ( sq km ) ) ( -LRB- ( ( 209 ( sq miles ) ) -RRB- ) ) ) ) ) ) ( , ( it ( ( is ( ( slightly smaller ) ( than ( ( ( ( ( the Isle ) ( of Man ) ) or ) twice ) ( ( ( Martha 's ) Vineyard ) ( in Massachusetts ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN With) (NP (NP (DT an) (NN area)) (PP (IN of) (NP (NP (QP (RB just) (CD 541)) (NN sq) (NN km)) (PRN (-LRB- -LRB-) (NP (CD 209) (NNP sq) (NNS miles)) (-RRB- -RRB-)))))) (, ,) (NP (PRP it)) (VP (VBZ is) (ADJP (ADJP (RB slightly) (JJR smaller)) (PP (IN than) (NP (NP (NP (DT the) (NNP Isle)) (PP (IN of) (NP (NN Man)))) (CC or) (ADVP (RB twice)) (NP (NP (NP (NNP Martha) (POS 's)) (NNP Vineyard)) (PP (IN in) (NP (NNP Massachusetts)))))))) (. .)))
It is an island in the Mediterranean Sea.
( It ( ( is ( ( an island ) ( in ( the ( Mediterranean Sea ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ is) (NP (NP (DT an) (NN island)) (PP (IN in) (NP (DT the) (NNP Mediterranean) (NNP Sea))))) (. .)))