Question: Mysie Monte is best known for her long-running portrayal of Mrs Boyle in a play that opened in London's West End in which year ?

Context paragraphs:
The Woman in Black (play): The Woman in Black is a 1987 stage play, adapted by Stephen Mallatratt.  The play is based on the book of the same name, which was published in 1983 by English author Susan Hill.  The play is currently being produced by PW Productions, led by Peter Wilson.  It is notable for only having two actors perform the whole play.  It was first performed at the Stephen Joseph Theatre in Scarborough, in 1987.  The production opened in London's West End in 1989 and is still being performed there, becoming the second longest-running non-musical play in West End history, after "The Mousetrap".

Mysie Monte: Mysie Monte (1892 - 9 January 1983) was an English stage and television actress best known for her long-running portrayal of Mrs Boyle in Agatha Christie's play The Mousetrap at the New Ambassadors Theatre.  She played the part for twelve and a half years between 2 May 1955 and 26 November 1967, with a break between 20 November 1960 and 6 November 1961 when she was replaced by the actress Madoline Thomas.  When asked in 1967 why she was leaving the cast Miss Monte replied "I think I have earned a rest."

Ryan Moloney: Ryan Moloney (born 24 November 1979) is an Australian actor best known for his long-running portrayal of the fictional character Jarrod "Toadfish" Rebecchi in the Australian soap opera "Neighbours".

Mrs Henderson Presents (musical): Mrs Henderson Presents is a musical comedy with music by George Fenton and Simon Chamberlain, with lyrics by Don Black and a book by Terry Johnson.  Based on the 2005 film "Mrs Henderson Presents", the musical received its world premiere at the Theatre Royal, Bath in 2015 and transferred to the West End's Noel Coward Theatre in February 2016.  The film was based on the true story of Laura Henderson and London's Windmill Theatre.

West End Frame Awards: The West End Frame Awards are London Theatre awards created by the theatre website West End Frame.  The awards are different from other theatre awards as they only open voting for one category at a time.  During 2012 theatre fans were invited to vote in seven categories.  High profile nominees during the 2012 awards included Kerry Ellis, Jodie Prenger, Rob Brydon and Lee Mead.  The winners included Shayne Ward for Best West End Debut and Daniel Buckley for Funniest Performance in a West End Show.

Lauren Koslow: Lauren Alice Koslow (born March 9, 1953) is an American actress, best known for her long-running portrayal of Kate Roberts on the NBC dramatic serial "Days of Our Lives", which she has played continuously since 1996.  She previously appeared in the soaps "The Bold and the Beautiful" and "The Young and the Restless".

Richard Shelton (actor): Richard Shelton is a Los Angeles-based British film, TV and theatre actor and acclaimed singer with a successful solo career based.  In the UK, Shelton is best known for playing the charmingly murderous role of Dr Adam Forsythe on British TV's long-running drama "Emmerdale" (ITV) and for his Best Actor in a Leading Role portrayal of Frank Sinatra in the award-winning drama "Rat Pack Confidential" in London's West End.  Shelton has recorded solo albums at Capitol Studios in Los Angeles and Abbey Road Studios in London.  He is also a familiar voice on BBC Radio 2 and 4 with many live international appearances to his credit.

Billy Boyle: Billy Boyle is an Irish actor on British film, television and stage.  He is a veteran of the West End stage having played leading roles in over 15 hit shows.  In his first West End musical "Maggie May" he was nominated as best newcomer.  Gower Champion then chose him to play Barnaby in "Hello Dolly" at The Theatre Royal Drury Lane.  He appeared in "Canterbury Tales" at the Phoenix Theatre as The Clerk of Oxford.  Harold Hobson, The Times critic said, "He was a breath of fresh air in the West-End".  He then went on to play leading roles in "No Sex Please, We're British", "Billy", "What's a Nice Country", "The Rivals", "Love, Lust, & Marriage", "Some Like it Hot", Disney's "Beauty and the Beast", and in the original cast of "Dirty Dancing.  Lately he has appeared as Grandpa George" and Grandpa Joe in Charlie and The Chocolate Factory at Drury Lane.  In 2016 he was Major Bouvier and Norman Vincent Peale in the smash hit Grey Gardens.  He followed this playing Arvide in Guys and Dolls at the Phoenix Theatre in the West End.He has had his own very successful television series in Ireland "It's Billy Boyle" as well as leading roles in "Trail of Guilt", the award-winning "The Grass Arena", "The Bretts", as well as many guest appearances in EastEnders, The Professionals, Coronation Street, Father Ted etc.  In the late 1970s, Boyle was cast as 'Ronald McDonald' in the European TV commercials and in all print media for the fast food chain McDonald's.  He was the last 'straight man' to Basil Brush on BBC1's "The Basil Brush Show" and later presented a programme, Dance Crazy for ITV, on the history of dance with Lesley Judd.  Lately he has been seen in Dirk Gently, for BBC Four and Lead Balloon.  His many films include Stanley Kubrick's "Barry Lyndon", "Groupie Girl", "Side by Side", "Shergar", "Wild Geese II", "The Scarlet and the Black", "Round Ireland with a Fridge" and A United Kingdom.

West End Central Police Station: The West End Central Police Station is a police station at 27 Savile Row, in London's West End, on the junction with Boyle Street.

The Mousetrap: The Mousetrap is a murder mystery play by Agatha Christie.  "The Mousetrap" opened in London's West End in 1952, and has been running continuously since then.  The longest running West End show, it has by far the longest initial run of any play in history, with its 25,000th performance taking place on 18 November 2012.  The play is known for its twist ending, which the audience are traditionally asked not to reveal after leaving the theatre.

Supporting paragraphs: Mysie Monte The Mousetrap
Answer: 1952