Question: Clay is a 2008 Hip-hop musical loosely based on Shakespeare's "Henry IV, Parts 1 and 2", the central character, Sir John, is based on Falstaff, a fictional character who is mentioned in five plays by who?

Context paragraphs:
Henry IV, Part I and Part II (film series): Henry IV, Part I and Henry IV, Part II are 2012 British television films based on the plays of the same name by William Shakespeare.  They are the second and third films in the series of television films called "The Hollow Crown" produced by Sam Mendes for BBC Two covering the second set of plays in Shakespeare's Henriad.  They were directed and adapted by Richard Eyre and star Jeremy Irons as King Henry IV, Simon Russell Beale as Falstaff and Tom Hiddleston as Prince Hal.  Much of the two films' cast and crew overlap and the plot flows directly from the first to the second.

Falstaff (Elgar): Falstaff – Symphonic Study in C minor, Op. 68, is an orchestral work by the English composer Edward Elgar.  Though not so designated by the composer, it is a symphonic poem in the tradition of Franz Liszt and Richard Strauss.  It portrays Sir John Falstaff, the "fat knight" of William Shakespeare's "Henry IV" Parts 1 and 2.

The Merry Wives of Windsor: The Merry Wives of Windsor is a comedy by William Shakespeare first published in 1602, though believed to have been written in or before 1597.  The Windsor of the play's title is a reference to the town of Windsor, also the location of Windsor Castle, in Berkshire, England, and though nominally set in the reign of Henry IV, the play makes no pretence to exist outside contemporary Elizabethan era English middle class life.  It features the character Sir John Falstaff, the fat knight who had previously been featured in "Henry IV, Part 1" and "Part 2".  It has been adapted for the opera on several occasions.  The play is one of Shakespeare's lesser-regarded works among literary critics.

Ned Poins: Edward "Ned" Poins, generally referred to as "Poins", is a fictional character who appears in two plays by Shakespeare, "Henry IV, Part 1" and "Henry IV, Part 2".  He is also mentioned in "The Merry Wives of Windsor".  Poins is Prince Hal's closest friend during his wild youth.  He devises various schemes to ridicule Falstaff, his rival for Hal's affections.

This England: The Histories: This England: The Histories was a season of Shakespeare's history plays staged by the Royal Shakespeare Company in 2000-2001.  The company staged both of Shakespeare's tetralogies of history plays so that audiences could see all eight plays over several days.  The plays staged were: "Richard II", "Henry IV, Part 1", "Henry IV, Part 2", "Henry V", "Henry VI, Part 1", "Henry VI, Part 2", "Henry VI, Part 3", and "Richard III".

Chimes at Midnight: Chimes at Midnight (onscreen title and UK title: Falstaff (Chimes at Midnight), Spanish release: Campanadas a medianoche), is a 1965 English-language Spanish-Swiss co-produced film directed by and starring Orson Welles.  The film's plot centres on William Shakespeare's recurring character Sir John Falstaff and the father-son relationship he has with Prince Hal, who must choose between loyalty to his father, King Henry IV, or Falstaff.

Prince Hal: Prince Hal is the standard term used in literary criticism to refer to Shakespeare's portrayal of the young Henry V of England as a prince before his accession to the throne, taken from the diminutive form of his name used in the plays almost exclusively by Falstaff.  Henry is called "Prince Hal" in critical commentary on his character in "Henry IV, Part 1" and "Henry IV, Part 2".

Henry IV, Part 1: Henry IV, Part 1 is a history play by William Shakespeare, believed to have been written no later than 1597.  It is the second play in Shakespeare's tetralogy dealing with the successive reigns of Richard II, Henry IV (two plays, including "Henry IV, Part 2"), and Henry V.  "Henry IV, Part 1" depicts a span of history that begins with Hotspur's battle at Homildon in Northumberland against Douglas late in 1402 and ends with the defeat of the rebels at Shrewsbury in the middle of 1403.  From the start it has been an extremely popular play both with the public and critics.

Clay (musical): Clay is a 2008 Hip-hop musical loosely based on Shakespeare's "Henry IV, Parts 1 and 2".  The central character, Sir John, is based on Falstaff.  It was written and performed by Matt Sax.  The first performance was at the Edinburgh Festival Fringe.

Falstaff: Sir John Falstaff is a fictional character who is mentioned in five plays by William Shakespeare and appears on stage in three of them.  His significance as a fully developed character in Shakespeare is primarily formed in the plays "Henry IV, Part 1" and "Part 2", where he is a companion to Prince Hal, the future King Henry V.  A notable eulogy for Falstaff is presented in Act II, Scene III of "Henry V", where Falstaff does not appear as a character on stage, as enacted by Mistress Quickly in terms that some scholars have ascribed to Plato's description of the death of Socrates after drinking hemlock.  By comparison, in "The Merry Wives of Windsor", Falstaff is presented by Shakespeare as the buffoonish suitor of two married women.

Supporting paragraphs: Clay (musical) Falstaff
Answer: William Shakespeare