Title: Efficient (horse)
Content:  Efficient (foaled 23 August 2003) is a grey Thoroughbred racehorse gelding, bred in New Zealand, who won the 2007 Melbourne Cup and the 2006 Victoria Derby, both times ridden by Michael Rodd. Efficient was by the outstanding sire Zabeel from the mare Refused The Dance by Defensive Play (USA). He is a half brother to Guillotine, winner of the 2008 MVRC Dato Tan Chin Nam Stakes. In his first campaign in the spring of 2006 he put together five consecutive wins including the Group 2 Aami Vase at Moonee Valley and ending with a win in the VRC Derby by 2½ lengths. Following his Derby win Efficient was entered into the Melbourne Cup field, run three days later. 
Title: Efficient (horse)
Content:  he did gain a third Group One success in the 2009 Turnbull Stakes. After this success Efficient did not race for almost two years. He returned to racing in September 2011 but did not show any form until he ran second to Niwot in the 3200 metre Sydney Cup at Randwick in April 2012. On 4 October 2012, Efficient's owner Lloyd Williams, announced that the horse had suffered a recurrence of an old injury and had been retired. He now resides with other former champion horses at Living Legends, the International Home of Rest for Champion Horses located in Woodlands Historic Park, Greenvale, Victoria, Australia. He occasionally makes public appearances at events such as the Melbourne Cup Parade.
Title: Efficient (horse)
Content:  His win dividend of $22.70 was the biggest for a Melbourne Cup winner in over ten years. He became the first grey to win the Melbourne Cup since Subzero in 1992 and the first horse since Phar Lap to win the Melbourne Cup the year after winning the Victoria Derby. Efficient was trained by expatriate New Zealand trainer Graeme Rogerson to win the cup, but switched to John Sadler soon after Rogerson decided to part company with the horse's owners, a syndicate headed by Lloyd and Suzy Williams. Efficient has had an injury-plagued career since his Melbourne Cup win, and was withdrawn from both the 2008 and 2009 Melbourne Cups in the fortnight leading up to the race. 
Title: Efficient (horse)
Content:  Weight for Age Group 1 Cox Plate over 2,040 metres at Moonee Valley where he finished 9th beaten 6½ lengths by the winner El Segundo. Efficient's next start was the Melbourne Cup, his first start in a handicap race since his first campaign. He dropped 3 kg from the Cox Plate run to carry 54.5 kg. Due to his poor recent form he was sent out a 16-1 chance. Reunited with jockey Michael Rodd for the first time since their 2006 Victoria Derby win, Efficient settled back in the field and travelled well. He was pulled to the outside to make a run and in the closing stages Efficient went on to defeat Purple Moon by half a 
Title: Efficient (horse)
Content:  he did not pull up well enough and so was scratched from the race and spelled instead. Returning in the autumn Efficient had a very light campaign of just two starts. In the 1,400-metre Group 3 Schweppervescence Cup he finished fourth behind Haradasun and fifth behind Miss Finland in the Group One Australian Guineas over 1,600 metres. As a four-year-old in the Spring of 2007 Efficient resumed in the Memsie Stakes at Caulfield and ran 10th beaten 7 lengths. At his next start he ran fourth in the Group 2 Dato Tan Chin Nam Stakes behind El Segundo and Haradasun. He then ran unplaced in the 2,000-metre Group 1 Turnbull Stakes. Three weeks later Efficient lined up in 
Title: 2006 Melbourne Cup
Content:  Victoria Derby winner Efficient pulled out of the Melbourne Cup lineup early on Tuesday morning with a knee injury, reducing the field to 23 runners. Efficient was aiming to become the first three-year-old since Skipton in 1941 to claim the Derby-Cup double. Tawqeet was inspected by veterinarians early Tuesday after concerns had been raised he may have injured his hoof after pulling the shoe on Monday afternoon.
Title: Easy Date
Content:  Easy Date was a 1972 bay daughter of American Quarter Horse Association (or AQHA) Hall of Fame member Easy Jet out of a Thoroughbred mare named Spot Cash. Spot Cash was a descendant of Teddy and Man o' War.
Title: Easy Date
Content:  Easy Date (born 1972) was an outstanding Quarter Horse racehorse and broodmare.
Title: Easy Jet
Content:  Longtime Quarter Horse breeder and racehorse owner Walter Merrick of Sayre, Oklahoma, bred Easy Jet from two future AQHA Hall of Fame members, Jet Deck and Thoroughbred mare Lena's Bar in 1967. His dam, or mother, Lena's Bar, had produced a small number of other offspring, but Easy et was her last; she died shortly after he was weaned, or removed from his mother's milk. Both of his parents were descended from Three Bars, who was the sire of Lena's Bar and the grandsire of Jet Deck's dam. Easy Jet is one of only two horses in the American Quarter 
Title: Effervescing (horse)
Content:  Bred by Ogden Phipps, Effervescing was a son of the French sire Le Fabuleux whose other significant progeny included American multiple Grade I winner, The Bart and Dauphin Fabuleux, the 1984 Canadian Horse of the Year. He was out of the American mare, Sparkling whose U.S. Racing Hall of Fame sire Bold Ruler was an inductee and the Leading sire in North America eight times.

Question: Who is the father of Efficient?
Answer: Zabeel.