(S (S (BASENP (PRP It)) (VP (VBZ is) (VP (ADVP (RB then)) (VP (VBN mixed) (PP (IN with) (NP (BASENP (DT the) (NN zest)) (PP (IN of) (NP (BASENP (NNS lemons)) (CC and) (BASENP (NN vanilla) (NN seed) (NNS cases)))))))))) (PERIOD .))