St. Barts, of course, is completely undefended.
( ( ( ( ( St. Barts ) , ) ( of course ) ) , ) ( ( is ( completely undefended ) ) . ) )
(ROOT (S (NP (NP (NNP St.) (NNP Barts)) (, ,) (PP (IN of) (NP (NN course))) (, ,)) (VP (VBZ is) (ADJP (RB completely) (JJ undefended))) (. .)))
St. Barts is a military powerhouse.  
( ( St. Barts ) ( ( is ( a ( military powerhouse ) ) ) . ) )
(ROOT (S (NP (NNP St.) (NNP Barts)) (VP (VBZ is) (NP (DT a) (JJ military) (NN powerhouse))) (. .)))