Question: What was the name of a thoroughbred racehorse that won the 1889 Epsom Oaks and was owned by the Earl of Dunraven and Lord Randolph Churchill, a man who created the National Union of the Conservative Party?

Context articles: Eswarah
Love Divine
Dibidale
Diminuendo (horse)
Jet Ski Lady
Lady Carla
Shahtoush
L'Abbesse de Jouarre
Lord Randolph Churchill
Light Shift

Eswarah (foaled 21 April 2002) is a British Thoroughbred racehorse and broodmare best known for winning the 2005 Epsom Oaks.
 In a racing career which lasted from April to August 2005 the filly ran five times and won three races.
 Unraced as a two-year-old, Eswarah won her first three races as a three-year-old culminating with a win in the Classic Oaks over one and a half miles at Epsom.
 In her two subsequent appearances she finished eighth in the King George VI and Queen Elizabeth Stakes and fourth in the Yorkshire Oaks.
Love Divine (foaled 12 February 1997) was a British Thoroughbred racehorse and broodmare best known for winning the Epsom Oaks in 2000.
 In a racing career which lasted from August 2000 to June 2001 the filly ran six times and won two races.
 After being beaten in her only race as a two-year-old, Love Divine won the Listed Lupe Stakes on her three-year-old debut and then won the Classic Oaks over one and a half miles at Epsom.
 She was beaten in her three remaining races, finishing second in the Yorkshire Oaks and fourth in both the Prix Vermeille and the Champion Stakes.
Dibidale (6 April 1971 – August 1975) was an Irish-bred, British-trained Thoroughbred racehorse.
 After one minor win in two races as a two-year-old, she emerged as arguably the best filly of her generation in the following year.
 She won the Cheshire Oaks by seven lengths and appeared a most unlucky loser when her saddle slipped in the closing stages of the Epsom Oaks.
 She then won the Irish Oaks by five lengths, beating the first three in the Epsom race and added a win in the Yorkshire Oaks before her season was ended by injury.
 She failed to win as a four-year-old and sustained a fatal injury in the Geoffrey Freer Stakes in August.
Diminuendo (9 February 1985 – 2010) was an American-bred, British-trained Thoroughbred racehorse and broodmare best known for winning the classic Epsom Oaks in 1988.
 She was one of the best two-year-old fillies of 1987, when she won all four of her races including the Cherry Hinton Stakes and Fillies' Mile.
 In 1988 she was beaten in her first two races, but won her next four, taking the Musidora Stakes, Epsom Oaks, Irish Oaks and Yorkshire Oaks.
 She finished second when favourite for the St. Leger Stakes and ended her racing career by finishing unplaced in the Prix de l'Arc de Triomphe, but was rated the best three-year-old filly of the season in Europe.
 She was then retired to stud, where she had some success as a broodmare.
Jet Ski Lady (foaled 20 February 1988) was an American-bred, Irish-trained Thoroughbred racehorse, best known for winning the Epsom Oaks in 1991.
 In a racing career which lasted from June 1990 to October 1991 the filly ran ten times and won four races.
 After winning twice as a two-year-old, Jet Ski Lady competed against colts with mixed success in early 1991 before winning the Classic Oaks over one and a half miles at Epsom Downs Racecourse.
 Her winning margin of ten lengths was the second widest in the race's history and her starting price of 50/1 made her the equal longest-priced winner of the Oaks on records.
 She subsequently finished second in both the Irish Oaks at the Curragh and the Yorkshire Oaks at York.
 She was retired to stud after finishing unplaced in the Prix de l'Arc de Triomphe.
Lady Carla (8 March 1993 – 2012) was a British Thoroughbred racehorse and broodmare best known for winning the Epsom Oaks in 1996.
 In a racing career which lasted from October 1995 to July 1997 the filly ran six times and won three races.
 After winning her only race as a two-year-old, Lady Carla won the Listed Oaks Trial Stakes at Lingfield Park on her three-year-old debut.
 Four weeks later she maintained her unbeaten run in the Classic Oaks over one and a half miles at Epsom, winning by nine lengths.
 She was beaten when favourite for the Irish Oaks and finished unplaced in two races the following season before being retired to stud.
Shahtoush (foaled 29 April 1995) was an Irish Thoroughbred racehorse and broodmare best known for winning the Epsom Oaks in 1998.
 In a racing career which lasted from August 1997 to September 1998 the filly ran eleven times and won three races.
 Shahtoush won only one minor race as a two-year-old, but showed top-class form when she finished third in the Group One Moyglare Stud Stakes.
 In 1998 she finished second in the 1000 Guineas at Newmarket Racecourse and then returned to England to win the Classic Oaks over one and a half miles at Epsom.
 She was beaten in her two remaining races, finishing unplaced in the Yorkshire Oaks and the Irish Champion Stakes.
L'Abbesse de Jouarre (1886 – 6 March 1897) was a Thoroughbred racehorse that won the 1889 Epsom Oaks.
 The horse was owned by Lord Randolph Churchill and the Earl of Dunraven during her three-year racing career.
 She was nicknamed "Abscess on the Jaw" during her career due to the difficulty the public had pronouncing her name.
 A versatile racehorse, she was able to win major races at distances ranging from six furlongs to one and a half miles.
 Retired from racing in 1891, L'Abbesse was the dam of the influential German broodmare Festa and the leading stallion Desmond.
 L'Abbesse de Jouarre died 6 March 1897 during foaling.
Lord Randolph Henry Spencer-Churchill (13 February 184924 January 1895) was a British statesman.
 Churchill was a genuine Tory radical, who coined the term Tory Democracy.
 He inspired a generation of party managers, created the National Union of the Conservative Party, broke new ground in modern budgetary presentations, attracting admiration and criticism alike from across the political spectrum.
 His most acerbic critics resided in his own party among his closest friends; but his disloyalty to Lord Salisbury was the beginning of the end of what should have been a glittering career.
 His devoted son, Winston, who hardly knew his father in life, wrote a biography of him.
Light Shift (22 March 2004 – 2014) was an American-bred, British-bred Thoroughbred racehorse and broodmare best known for winning the 2007 Epsom Oaks.
 In a racing career which lasted from June 2006 to October 2007 the filly ran nine times and won four races.
 After winning once as a two-year-old, Light Shift won the Cheshire Oaks on her second appearance as a three-year-old.
 She then won the Classic Oaks over one and a half miles at Epsom, beating the Irish filly Peeping Fawn.
 Light Shift never won another race, being beaten by Peeping Fawn in the Irish Oaks and the Nassau Stakes and finishing unplaced in the Prix de l'Opera.