Richard Bauerls writes interestingly about the recent proliferation of  one-letter words  [XIV, 1; XV, 1].
( ( ( Richard Bauerls ) writes ) ( ( ( interestingly ( about ( ( the ( recent proliferation ) ) ( of ( one-letter words ) ) ) ) ) ( ( ( -LSB- XIV ) , ) ( ( 1 ; ) ( ( XV , ) ( 1 -RSB- ) ) ) ) ) . ) )
(ROOT (SINV (S (NP (NNP Richard) (NNP Bauerls)) (VP (VBZ writes))) (VP (VBD interestingly) (PP (IN about) (NP (NP (DT the) (JJ recent) (NN proliferation)) (PP (IN of) (NP (JJ one-letter) (NNS words)))))) (NP (NP (NNP -LSB-) (NNP XIV)) (, ,) (NP (NP (CD 1)) (: ;) (NP (NP (NNP XV)) (, ,) (NP (CD 1) (NNS -RSB-))))) (. .)))
The recent popularity of one-letter words discussed by Richard Bauerls. 
( ( ( The ( recent popularity ) ) ( of ( one-letter words ) ) ) ( ( discussed ( by ( Richard Bauerls ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ recent) (NN popularity)) (PP (IN of) (NP (JJ one-letter) (NNS words)))) (VP (VBN discussed) (PP (IN by) (NP (NNP Richard) (NNPS Bauerls)))) (. .)))