Rosemary is a comedy by English playwright Louis N. Parker and English playwright and actor Murray Carson.
 In America, it opened at Charles Frohman's Empire Theatre on Broadway in the August 1896.
 A film version was produced in 1915.
Thomas Kyd (baptised 6 November 1558; buried 15 August 1594) was an English playwright, the author of "The Spanish Tragedy", and one of the most important figures in the development of Elizabethan drama.
Benjamin "Ben" Jonson (c. 11 June 1572 – 6 August 1637) was an English playwright, poet, actor, and literary critic, whose artistry exerted a lasting impact upon English poetry and stage comedy.
 He popularised the comedy of humours.
 He is best known for the satirical plays "Every Man in His Humour" (1598), "Volpone, or The Fox" (c. 1606), "The Alchemist" (1610) and "Bartholomew Fair" (1614) and for his lyric poetry; he is generally regarded as the second most important English playwright during the reign of James I after William Shakespeare.
Thomas Jevon (1652–1688) was an English playwright, and one of the first English Harlequins.
 He began his career as a dancing master, but worked his way onto the stage, and played leading low-comedy parts in London between 1673 and 1688.
 His brother-in-law was the English playwright and poet laureate Thomas Shadwell.
Arthur Wilson (baptised 14 December 1595 – autumn 1652) was a seventeenth-century English playwright, historian, and poet.
 Though born a commoner, he worked professionally as a gentleman-in-waiting and steward to several of the most powerful Parliamentarians during the era leading up to the English Civil War.
 He is remembered today as a minor playwright who wrote several successful plays for London's Blackfriars Theatre as well as the author of "The History of Great Britain, being the Life and Reign of King James I", a valuable nonfiction work that documents the anti-Stuartism prevalent in the late Caroline era.
Nicholas Udall (or Uvedale Udal, Woodall, or other variations ) (1504 – 23 December 1556) was an English playwright, cleric, and schoolmaster, the author of "Ralph Roister Doister", generally regarded as the first comedy written in the English language.
Sonnet 56 is one of 154 sonnets written by the English playwright and poet William Shakespeare.
 It's a member of the Fair Youth sequence, in which the poet expresses his love towards a young man.
 The exact date of its composition is unknown, it is thought that the Fair Youth sequence was written in the first half of the 1590s and was published with the rest of the sonnets in the 1609 Quarto.
The Author's Farce and the Pleasures of the Town is a play by the English playwright and novelist Henry Fielding, first performed on 30 March 1730 at the Little Theatre, Haymarket.
 Written in response to the Theatre Royal's rejection of his earlier plays, "The Author's Farce" was Fielding's first theatrical success.
 The Little Theatre allowed Fielding the freedom to experiment, and to alter the traditional comedy genre.
 The play ran during the early 1730s and was altered for its run starting 21 April 1730 and again in response to the Actor Rebellion of 1733.
 Throughout its life, the play was coupled with several different plays, including "The Cheats of Scapin" and Fielding's "Tom Thumb".
Noises Off is a 1982 play by the English playwright Michael Frayn.
 The idea for it came in 1970, when Frayn was watching from the wings a performance of "The Two of Us", a farce that he had written for Lynn Redgrave.
 He said, "It was funnier from behind than in front, and I thought that one day I must write a farce from behind."
 The prototype, a short-lived one-act play called "Exits", was written and performed in 1977.
 At the request of his associate, Michael Codron, Frayn expanded this into what would become "Noises Off".
 It takes its title from the theatrical stage direction indicating sounds coming from offstage.
The Ur-Hamlet (the German prefix "Ur-" means "primordial") is a play by an unknown author, thought to be either Thomas Kyd or William Shakespeare.
 No copy of the play, dated by scholars to the second half of 1587, survives today.
 The play is known to have been staged in London, more specifically at The Burbages Shoreditch Playhouse as recalled by Elizabethan author Thomas Lodge.
 The play is known to have a character named Hamlet; the only other known character from the play is a ghost who cries, "Hamlet, revenge!"

Question: Which English playwright was thought to be author of The Ur-Hamlet
Answer: Thomas Kyd