Question: Who was the sibling of the creator of Mercutio?

full_context: Document 1: Judith Quiney: Judith Quiney (baptised 2 February 1585 – 9 February 1662), , was the younger daughter of William Shakespeare and Anne Hathaway and the fraternal twin of their only son Hamnet Shakespeare. She married Thomas Quiney, a vintner of Stratford-upon-Avon. The circumstances of the marriage, including Quiney's misconduct, may have prompted the rewriting of Shakespeare's will. Thomas was struck out, while Judith's inheritance was attached with provisions to safeguard it from her husband. The bulk of Shakespeare's estate was left, in an elaborate fee tail, to his elder daughter Susanna and her male heirs.
Document 2: Shakespeare's Birthplace: Shakespeare's Birthplace is a restored 16th-century half-timbered house situated in Henley Street, Stratford-upon-Avon, Warwickshire, England, where it is believed that William Shakespeare was born in 1564 and spent his childhood years. It is now a small museum open to the public and a popular visitor attraction, owned and managed by the Shakespeare Birthplace Trust. It has been referred to as "a mecca for all lovers of literature".
Document 3: Joan Shakespeare: Joan Shakespeare (baptised 15 April 1569 – buried 4 November 1646) was the sister of William Shakespeare. She is the only member of the family whose known descendants continue down to the present day.
Document 4: Sibyl de Neufmarché: Through the advantageous marriages of her daughters, Sibyl was an ancestress of many of England and Ireland's noblest families including among others, the de Bohuns, de Beauchamps, Mortimers, Fitzalans, de Burghs, de Lacys, and Bonvilles. Four of her descendants, Humphrey de Bohun, 4th Earl of Hereford, Elizabeth de Burgh, 4th Countess of Ulster, Eleanor de Bohun, and Mary de Bohun married into the English royal family, while another, Anne Mortimer was the grandmother of Yorkist kings Edward IV and Richard III. By way of Edward's daughter, Elizabeth of York, every monarch of England and, subsequently, the United Kingdom, from Henry VIII up to and including Elizabeth II, descended from Sibyl de Neufmarché, as did the various royal sovereigns of Europe who shared a common descent from Mary, Queen of Scots.
Document 5: Joan Barfoot: Joan Barfoot was born on May 17, 1946 in Owen Sound, Ontario, and graduated with a degree in English from the University of Western Ontario in 1969. She worked as a reporter and editor for various newspapers in Ontario including the "Windsor Star", the "Toronto Sun" and the "London Free Press". As a child, while she and her mother watched a squirrel in their back yard from their kitchen, her mother told Barfoot to tell her the squirrel's story and she'd write it down. Barfoot doesn't remember the story but remembers her delight when her mother read the story back to her and the power of creating it. Barfoot was also encouraged to write by a teacher who told Barfoot she wrote well and to consider some word-related career. In addition to writing Barfoot occasionally teaches creative writing classes though she believes writing ought to be an entirely private pleasure and a puzzle. She lives in London, Ontario.
Document 6: Romeo and Juliet (1968 film): Leonard Whiting as Romeo Montague Olivia Hussey as Juliet Capulet John McEnery as Mercutio Milo O'Shea as Friar Laurence Pat Heywood as The Nurse Robert Stephens as The Prince Michael York as Tybalt Bruce Robinson as Benvolio Paul Hardwick as Lord Capulet Natasha Parry as Lady Capulet Antonio Pierfederici as Lord Montague Esmeralda Ruspoli as Lady Montague Keith Skinner as Balthasar Roberto Bisacco as Paris Bruno Filippini as Leonardo, the singer (uncredited) Laurence Olivier as Chorus and voice of Lord Montague (uncredited)
Document 7: Shakespeare Sarani: Shakespeare Sarani (earlier Theatre Road) is a street running in the central business district of Kolkata, India, from Park Circus to Jawaharlal Nehru Road (Chowringhee Road). It was renamed on 24 April 1964 after William Shakespeare, to mark the fourth birth centenary of the legendary playwright. It is considered to be a high street of Kolkata with many commercial establishments, offices, shops and restaurants situated by the road. It intersects with other important roads in the CBD like AJC Bose Road & APC Road, Camac Street, Loudon Street and Rawdon Street. Few other roads like, Little Russel Street, Wood Street, Picasso Bithi & Lord Sinha Road criss-crosses or merge into Shakespeare Sarani from North or South.
Document 8: Romeo and Juliet: Romeo and Juliet is a tragedy written by William Shakespeare early in his career about two young star - crossed lovers whose deaths ultimately reconcile their feuding families. It was among Shakespeare's most popular plays during his lifetime and along with Hamlet, is one of his most frequently performed plays. Today, the title characters are regarded as archetypal young lovers.
Document 9: Gnomeo & Juliet: Gnomeo and Juliet have secret meetings in the nearby garden, where they meet a pink plastic flamingo named Featherstone (Jim Cummings) who encourages their love. Lord Redbrick pairs Juliet with a Red Gnome named Paris (Stephen Merchant), but Juliet is n't interested in him and distracts him with Nanette who has feelings for him.
Document 10: Richard Feynman: When Richard was five years old, his mother gave birth to a younger brother, but this brother died at four weeks of age. Four years later, Richard gained a sister, Joan, and the family moved to Far Rockaway, Queens. Though separated by nine years, Joan and Richard were close, as they both shared a natural curiosity about the world. Their mother thought that women did not have the cranial capacity to comprehend such things. Despite their mother's disapproval of Joan's desire to study astronomy, Richard encouraged his sister to explore the universe. Joan eventually became an astrophysicist specializing in interactions between the Earth and the solar wind.
Document 11: Joan Copeland: Joan Maxine Copeland (née Miller; born June 1, 1922) is an American actress. She is the younger sister of playwright Arthur Miller. She began her career during the mid-1940s, appearing in theatre in New York City, where, shortly thereafter, she would become one of the very first members admitted to the newly formed Actors Studio. She moved into television and film during the 1950s. while still maintaining an active stage career. She is best known for her performances in the 1977 Broadway revival of "Pal Joey" and her award-winning performance in the 1981 play "The American Clock". She has also played a number of prominent roles on various soap operas throughout her career, including Andrea Whiting on "Search for Tomorrow" and Gwendolyn Lord Abbott on "One Life to Live".
Document 12: Mercutio: Mercutio ( ) is a fictional character in William Shakespeare's 1597 tragedy, "Romeo and Juliet". He is a close friend to Romeo and a blood relative to Prince Escalus and Count Paris. As such, being neither a Montague nor a Capulet, Mercutio is one of the named characters in the play with the ability to mingle around those of both houses. The invitation to Capulet's party states that he has a brother named Valentine.
Document 13: A rose by any other name would smell as sweet: ``A rose by any other name would smell as sweet ''is a popular reference to William Shakespeare's play Romeo and Juliet, in which Juliet seems to argue that it does not matter that Romeo is from her family's rival house of Montague, that is, that he is named`` Montague''. The reference is often used to imply that the names of things do not affect what they really are. This formulation is, however, a paraphrase of Shakespeare's actual language. Juliet compares Romeo to a rose saying that if he was not named Romeo he would still be handsome and be Juliet's love. This states that if he was not Romeo, then he would not be a Montague and she would be able to get married with no problem at all.
Document 14: Romeo + Juliet: William Shakespeare's Romeo and Juliet (shortened to Romeo + Juliet) is a 1996 American romantic crime film directed, co-produced, and co-written by Baz Luhrmann, co-produced by Gabriella Martinelli, and co-written by Craig Pearce, being an adaptation and modernization of William Shakespeare's tragedy Romeo and Juliet. The film stars Leonardo DiCaprio and Claire Danes in the leading roles of Romeo and Juliet, who instantly fall in love when Romeo crashes a party and meets her, despite their being members of the Montague and Capulet family; Brian Dennehy, John Leguizamo, Pete Postlethwaite, Paul Sorvino, and Diane Venora star in supporting roles.
Document 15: Valentine Rescuing Sylvia from Proteus: Valentine Rescuing Sylvia from Proteus is an 1851 oil painting by William Holman Hunt. It depicts a scene from William Shakespeare's "The Two Gentlemen of Verona". The top left and right portions of the frame include excerpts from act V, scene IV of the play. From left to right, the characters are Julia, disguised as a page, Sylvia, Valentine, and Proteus, who is in love with Julia. Sylvia's father, the Duke of Milain, and a group of followers are present in the background.
ground_truth: Joan Shakespeare
sub_queries: Who is Mercutio by? Answer: William Shakespeare
William Shakespeare >> sibling Answer: Joan Shakespeare