Matches are held only intermittently, however The Calcutta Cup Match, in early April, pits the Scots against their  auld  enemy the English and is a great spectacle.
( Matches ( ( ( ( ( ( are ( held ( only ( ( ( ( ( intermittently , ) however ) ( The ( Calcutta ( Cup Match ) ) ) ) , ) ( in ( early April ) ) ) ) ) ) , ) ( ( pits ( the Scots ) ) ( against ( ( their ( auld enemy ) ) ( the English ) ) ) ) ) and ) ( is ( a ( great spectacle ) ) ) ) . ) )
(ROOT (S (NP (NNS Matches)) (VP (VP (VBP are) (VP (VBN held) (PP (ADVP (RB only)) (NP (NP (NN intermittently)) (, ,) (ADVP (RB however)) (NP (DT The) (NNP Calcutta) (NNP Cup) (NNP Match)) (, ,)) (IN in) (NP (RB early) (NNP April))))) (, ,) (VP (VBZ pits) (NP (DT the) (NNPS Scots)) (PP (IN against) (NP (NP (PRP$ their) (JJ auld) (NN enemy)) (NP (DT the) (NNP English))))) (CC and) (VP (VBZ is) (NP (DT a) (JJ great) (NN spectacle)))) (. .)))
The Calcutta Cup Match is seen by most to be one of the most boring events of a given year.
( ( The ( Calcutta ( Cup Match ) ) ) ( ( is ( ( seen ( by most ) ) ( to ( be ( one ( of ( ( the ( ( most boring ) events ) ) ( of ( a ( given year ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNP Calcutta) (NNP Cup) (NNP Match)) (VP (VBZ is) (VP (VBN seen) (PP (IN by) (ADJP (JJS most))) (S (VP (TO to) (VP (VB be) (NP (NP (CD one)) (PP (IN of) (NP (NP (DT the) (ADJP (RBS most) (JJ boring)) (NNS events)) (PP (IN of) (NP (DT a) (VBN given) (NN year))))))))))) (. .)))