Question: Which river in the English county of Warwickshire has a ferry named after the main antagonist from the William Shakespeare comedy Twelfth Night?
Context: Twelfth Night is a festival in some branches of Christianity marking the coming of the Epiphany.  Different traditions mark the date of Twelfth Night on either 5 January or 6 January; the Church of England, Mother Church of the Anglican Communion, celebrates Twelfth Night on the 5th and "refers to the night before Epiphany, the day when the nativity story tells us that the wise men visited the infant Jesus".  In Western Church traditions, the Twelfth Night concludes the Twelve Days of Christmas; although, in others, the Twelfth Night can precede the Twelfth Day.  Bruce Forbes writes:In 567 the Council of Tours proclaimed that the entire period between Christmas and Epiphany should be considered part of the celebration, creating what became known as the twelve days of Christmas, or what the English called Christmastide.  On the last of the twelve days, called Twelfth Night, various cultures developed a wide range of additional special festivities.  The variation extends even to the issue of how to count the days.  If Christmas Day is the first of the twelve days, then Twelfth Night would be on January 5, the eve of Epiphany.  If December 26, the day after Christmas, is the first day, then Twelfth Night falls on January 6, the evening of Epiphany itself. Feste is a fool in the William Shakespeare comedy "Twelfth Night".  He is attached to the household of the Countess Olivia.  He has apparently been there for some time, as he was a "fool that the Lady Olivia's father took much delight in" (2.4).  Although Olivia's father has died within the last year, it is possible that Feste approaches or has reached middle age, though he still has the wit to carry off good 'fooling' when he needs to, and the voice to sing lustily or plangently as the occasion demands.  He is referred to by name only once during the play, in answer to an inquiry by Orsino of who sang a song that he heard the previous evening.  Curio responds "Feste, the jester, my lord; a fool that the lady Olivia's father took much delight in.  He is about the house" (2.4).  Throughout the rest of the play, he is addressed only as "Fool," while in the stage directions he is mentioned as "Clown." Twelfth Night, or What You Will is a comedy by William Shakespeare, believed to have been written around 1601–02 as a Twelfth Night's entertainment for the close of the Christmas season.  The play centres on the twins Viola and Sebastian, who are separated in a shipwreck.  Viola (who is disguised as Cesario) falls in love with Duke Orsino, who in turn is in love with the Countess Olivia.  Upon meeting Viola, Countess Olivia falls in love with her thinking she is a man.  The play expanded on the musical interludes and riotous disorder expected of the occasion, with plot elements drawn from the short story "Of Apollonius and Silla" by Barnabe Rich, based on a story by Matteo Bandello.  The first recorded performance was on 2 February 1602, at Candlemas, the formal end of Christmastide in the year's calendar.  The play was not published until its inclusion in the 1623 First Folio. Illyria is a musical with book, music, and lyrics by Pete Mills, based on William Shakespeare's Twelfth Night, written in 2002.  Illyria is a traditional adaption of Twelfth Night, but features a more contemporary score. Twelfth Night (also known as Twelfth Night: Or What You Will) is a 1996 British film adaptation of William Shakespeare's play, directed by Trevor Nunn and featuring an all-star cast.  Set in the late 20th century, it was filmed on location in Cornwall, including scenes shot at Padstow and at Lanhydrock House near Bodmin, with Orsino and his followers wearing uniforms that evoke the Austro-Hungarian Empire. The Stratford-upon-Avon chain ferry is a manually operated pedestrian chain ferry across the River Avon in the town of Stratford-upon-Avon in the English county of Warwickshire.  The ferry is owned by Stratford-upon-Avon District Council.  It links Waterside, roughly halfway between the Royal Shakespeare Theatre and Holy Trinity Church, with the water meadows on the opposite side of the river.  The vessel used on the service is named "Malvolio", after the character of the same name in William Shakespeare's comedy Twelfth Night. Malvolio is the steward of Olivia's household in William Shakespeare's comedy "Twelfth Night, or What You Will".  He is often portrayed as the main antagonist. Tobias Beer (born 1976) is an English actor.  Born in Cambridge, he studied at Oxford University and the Webber Douglas Academy of Dramatic Art .  He has worked predominantly in the theatre, and his credits include: "Great Expectations", "Merry Wives of Windsor" (with Judi Dench, Simon Callow and Alistair McGowan), "Twelfth Night" and "The Comedy of Errors" (all for the Royal Shakespeare Company); "The Changeling" for Cheek by Jowl, directed by Declan Donnellan; "Cymbeline", "Twelfth Night", "Macbeth" and "A Midsummer Night's Dream" for the Open Air Theatre, Regent's Park In 2015 he will return to the RSC in Death of a Salesman. Twelfth Night, or, What You Will is a videotaped 1988 television adaptation of Kenneth Branagh's stage production for the Renaissance Theatre Company of William Shakespeare's "Twelfth Night" first broadcast in the UK by ITV on 30 December 1988.  Made by Thames Television, in collaboration with Renaissance, it stars Frances Barber as Viola and Richard Briers as Malvolio.  The recording was shot on a single set with the appearance of a wintry garden.  The costumes are Victorian, and the time of year is Christmas. Warwickshire County Cricket Club is one of the 18 member clubs of the English County Championship, representing the historic county of Warwickshire.  The club was established on 8 April 1882 and has played first-class cricket since 1894, List A cricket since 1963, and Twenty20 cricket since 2003.  Unlike most professional sports, in which a team usually has a single fixed home ground, county cricket clubs have traditionally used different grounds in various towns and cities within the county for home matches, although the use of minor "out grounds" has diminished since the 1980s.  Warwickshire have played first class, List A, or Twenty20 matches at eleven different grounds.  Six of these grounds are or were located in the cities of Birmingham and Coventry, which no longer lie within the county of Warwickshire due to changes in the county boundaries in England in 1974.
Answer: River Avon