that is n't heated properly , so that it ends up 
(ROOT (S (NP (DT that)) (VP (VBZ is) (RB n't) (VP (VBN heated) (ADVP (RB properly)) (, ,) (SBAR (IN so) (IN that) (S (NP (PRP it)) (VP (VBZ ends) (PRT (RP up)))))))))
(ROOT (S (NP (DT )) (VP (VBZ ) (RB ) (VP (VBN ) (ADVP (RB )) (, ) (SBAR (IN ) (IN ) (S (NP (PRP )) (VP (VBZ ) (PRT (RP )))))))))