Today, nothing remains except the foundations.
( Today ( , ( nothing ( ( remains ( except ( the foundations ) ) ) . ) ) ) )
(ROOT (S (NP (NN Today)) (, ,) (NP (NN nothing)) (VP (VBZ remains) (PP (IN except) (NP (DT the) (NNS foundations)))) (. .)))
The foundations were replaced.
( ( The foundations ) ( ( were replaced ) . ) )
(ROOT (S (NP (DT The) (NNS foundations)) (VP (VBD were) (VP (VBN replaced))) (. .)))