It is one of those rare cases in which I can please everyone.
( It ( ( is ( one ( of ( ( those ( rare cases ) ) ( ( in which ) ( I ( can ( please everyone ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ is) (NP (NP (CD one)) (PP (IN of) (NP (NP (DT those) (JJ rare) (NNS cases)) (SBAR (WHPP (IN in) (WHNP (WDT which))) (S (NP (PRP I)) (VP (MD can) (VP (VB please) (NP (NN everyone)))))))))) (. .)))
It is a rare situation that lets me make everybody happy.
( It ( ( is ( ( a ( rare situation ) ) ( that ( lets ( me ( make ( everybody happy ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ is) (NP (NP (DT a) (JJ rare) (NN situation)) (SBAR (WHNP (WDT that)) (S (VP (VBZ lets) (S (NP (PRP me)) (VP (VB make) (S (NP (NN everybody)) (ADJP (JJ happy)))))))))) (. .)))