they will have a showdown , but , by then , your senses are as mushy as peas 
(ROOT (S (S (NP (PRP they)) (VP (MD will) (VP (VB have) (NP (DT a) (NN showdown))))) (, ,) (CC but) (, ,) (S (PP (IN by) (ADVP (RB then))) (, ,) (NP (PRP$ your) (NNS senses)) (VP (VBP are) (ADJP (ADJP (RB as) (JJ mushy)) (PP (IN as) (NP (NNS peas))))))))
(ROOT (S (S (NP (PRP )) (VP (MD ) (VP (VB ) (NP (DT ) (NN ))))) (, ) (CC ) (, ) (S (PP (IN ) (ADVP (RB ))) (, ) (NP (PRP$ ) (NNS )) (VP (VBP ) (ADJP (ADJP (RB ) (JJ )) (PP (IN ) (NP (NNS ))))))))