But then, ha, ha that changed quickly.
( But ( then ( , ( ha ( , ( ( ha ( that ( changed quickly ) ) ) . ) ) ) ) ) )
(ROOT (S (CC But) (ADVP (RB then)) (, ,) (ADVP (RB ha)) (, ,) (VP (VBP ha) (SBAR (IN that) (S (VP (VBD changed) (ADVP (RB quickly)))))) (. .)))
It never did change.
( It ( never ( ( did change ) . ) ) )
(ROOT (S (NP (PRP It)) (ADVP (RB never)) (VP (VBD did) (NP (NN change))) (. .)))