You did a really good job.
( You ( ( did ( a ( ( really good ) job ) ) ) . ) )
(ROOT (S (NP (PRP You)) (VP (VBD did) (NP (DT a) (ADJP (RB really) (JJ good)) (NN job))) (. .)))
Unfortunately, what you did was absolutely horrible.
( Unfortunately ( , ( ( what ( you did ) ) ( ( was ( absolutely horrible ) ) . ) ) ) )
(ROOT (S (ADVP (RB Unfortunately)) (, ,) (SBAR (WHNP (WP what)) (S (NP (PRP you)) (VP (VBD did)))) (VP (VBD was) (ADJP (RB absolutely) (JJ horrible))) (. .)))