(S (S (S (BASENP (NNP Bertha)) (VP (VP (VBD became) (NP (BASENP (DT the) (JJ first) (NN hurricane)) (PP (IN of) (BASENP (DT the) (NN 2008) (NNP Atlantic) (NN hurricane) (NN season))))) (BASENP (NNP Monday)))) (COMMA ,) (SBAR (IN after) (S (VP (VBG strengthening) (PP (IN from) (BASENP (DT a) (JJ tropical) (NN storm) (NN overnight))))))) (PERIOD .))