You may recall from my earlier letter regarding our 50th reunion that a room in the Union Building has been reserved for our use following the banquet on Friday.
( You ( ( may ( recall ( from ( ( my ( earlier letter ) ) ( ( regarding ( our ( 50th reunion ) ) ) ( that ( ( ( a room ) ( in ( the ( Union Building ) ) ) ) ( has ( been ( reserved ( for ( ( our use ) ( following ( ( the banquet ) ( on Friday ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP You)) (VP (MD may) (VP (VB recall) (PP (IN from) (NP (NP (PRP$ my) (JJR earlier) (NN letter)) (VP (VBG regarding) (NP (PRP$ our) (JJ 50th) (NN reunion)) (SBAR (IN that) (S (NP (NP (DT a) (NN room)) (PP (IN in) (NP (DT the) (NNP Union) (NNP Building)))) (VP (VBZ has) (VP (VBN been) (VP (VBN reserved) (PP (IN for) (NP (NP (PRP$ our) (NN use)) (PP (VBG following) (NP (NP (DT the) (NN banquet)) (PP (IN on) (NP (NNP Friday))))))))))))))))) (. .)))
I did not talk about room reservations in my letter.
( I ( ( ( did not ) ( talk ( about ( ( room reservations ) ( in ( my letter ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBD did) (RB not) (VP (VB talk) (PP (IN about) (NP (NP (NN room) (NNS reservations)) (PP (IN in) (NP (PRP$ my) (NN letter))))))) (. .)))