(S (S (BASENP (DT The) (NNP Danziger) (NNP Bridge)) (VP (VBZ spans) (NP (BASENP (DT a) (NN canal)) (SBAR (WHNP (WDT which)) (S (VP (VBZ connects) (NP (BASENP (NNP Lake) (NNP Pontchartrain)) (CC and) (BASENP (DT the) (NNP Mississippi) (NNP River))))))))) (PERIOD .))