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)))))))) (. .)))
Martha's Vineyard is four times the size of the Isle of Man.
( ( ( Martha 's ) Vineyard ) ( ( is ( ( ( four times ) ( the size ) ) ( of ( ( the Isle ) ( of Man ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Martha) (POS 's)) (NNP Vineyard)) (VP (VBZ is) (NP (NP (QP (CD four) (NNS times)) (DT the) (NN size)) (PP (IN of) (NP (NP (DT the) (NNP Isle)) (PP (IN of) (NP (NN Man))))))) (. .)))