Question:
William James Dixon (July 1, 1915 - January 29, 1992) was an American blues musician, vocalist, songwriter, arranger and record producer. He was proficient in playing both the upright bass and the guitar and was a capable singer, but he is perhaps best known as one of the most prolific songwriters of his time. Next to Muddy Waters, Dixon is recognized as the most influential person in shaping the post-World War II sound of the Chicago blues. Dixon's songs have been recorded by countless musicians in many genres as well as by various ensembles in which he participated.
Dixon signed with Chess Records as a recording artist, but he began performing less, being more involved with administrative tasks for the label. By 1951, he was a full-time employee at Chess, where he acted as producer, talent scout, session musician and staff songwriter. He was also a producer for the Chess subsidiary Checker Records. His relationship with Chess was sometimes strained, but he stayed with the label from 1948 to the early 1960s. During this time Dixon's output and influence were prodigious. From late 1956 to early 1959, he worked in a similar capacity for Cobra Records, for which he produced early singles for Otis Rush, Magic Sam, and Buddy Guy. He later recorded for Bluesville Records. From the late 1960s until the mid-1970s, Dixon ran his own record label, Yambo Records, and two subsidiary labels, Supreme and Spoonful. He released his 1971 album, Peace?, on Yambo and also singles by McKinley Mitchell, Lucky Peterson and others. Dixon is considered one of the key figures in the creation of Chicago blues. He worked with Chuck Berry, Muddy Waters, Howlin' Wolf, Otis Rush, Bo Diddley, Joe Louis Walker, Little Walter, Sonny Boy Williamson, Koko Taylor, Little Milton, Eddie Boyd, Jimmy Witherspoon, Lowell Fulson, Willie Mabon, Memphis Slim, Washboard Sam, Jimmy Rogers, Sam Lay and others. In December 1964, the Rolling Stones reached number one on the UK Singles Chart with their cover of Dixon's "Little Red Rooster". In the same year, the group also covered "I Just Want To Make Love To You" on their debut album, The Rolling Stones.
Answer this question using a quote from the text above:

Did he work with anyone else?

Answer:
Little Walter, Sonny Boy Williamson, Koko Taylor, Little Milton, Eddie Boyd, Jimmy Witherspoon, Lowell Fulson,

Answer the question at the end by quoting:

Affirmed (February 21, 1975 - January 12, 2001) was an American Thoroughbred racehorse who was the eleventh winner of the United States Triple Crown of Thoroughbred Racing. Affirmed was also known for his famous rivalry with Alydar, whom he met ten times, including in all three Triple Crown races. Affirmed was the last horse to win the Triple Crown for a 37-year period, which was ended in 2015 by American Pharoah. Affirmed won fourteen Grade
Alydar was made the 6-5 favorite for Kentucky Derby, with Affirmed the second choice at 9-5 and undefeated Sensitive Prince the third choice at 9-2. At the start of the Kentucky Derby, Sensitive Prince took the early lead as Affirmed ran in third through the early stages, while Alydar stayed far back. Affirmed made a strong move for the lead on the far turn, put away a challenge by Wood Memorial winner Believe It, and held off Alydar's fast-closing charge to win by 1 1/2 lengths. Affirmed now had a 5-2 edge in the series. In the Preakness Stakes, Affirmed set the pace. Alydar made his big move on the far turn, at the same point in the race where Affirmed made his winning move in the Derby. Affirmed held a short lead entering the stretch and held it to defeat Alydar by a neck. Alydar's partisans assumed that the 1 1/2 mile distance of the Belmont, two furlongs longer than the Derby and 5/16 of a mile longer than the Preakness Stakes, would favor Alydar with his finishing style and staying pedigree, and he would deny Affirmed the Triple Crown. Trainer Veitch removed Alydar's blinkers for the Belmont, saying that if Alydar got a better look at Affirmed, maybe he would get by him. In the Belmont, Affirmed led and set a very slow pace, going the first quarter mile in 25 seconds and the half in 50 seconds. Alydar's jockey, Jorge Velasquez, put Alydar close to the pace, and moved alongside Affirmed with more than seven furlongs to go. For more than six furlongs (half the distance of the race), the colts raced neck and neck, pulling away from the rest of the field. Alydar got his nose in front at mid-stretch, but just as Affirmed appeared to tire, Cauthen went to a left-handed whip, something he had never done before in his eight rides on Affirmed. Affirmed won by a nose to become racing's 11th (and last winner for 37 years until American Pharoah won in 2015), Triple Crown winner. After the third slowest start in Belmont Stakes history, they raced the fastest last mile in Belmont Stakes history, 3/4 in 1:14, the mile in 1:37 2/5 and finished in 2:26 4/5. It was, at the time, the third fastest Belmont ever, behind Secretariat and Gallant Man. His Triple Crown win set two records: the shortest and longest gaps between the previous and next Triple Crown winners. Affirmed's win in 1978 was the first time the Triple Crown had been won in consecutive years (Seattle Slew won in 1977). Affirmed's win also marked the start of the longest gap until the next Triple Crown winner, with American Pharoah's win on June 6, 2015 occurring 37 years later.

Which horses did he beat when he won the crown?
Secretariat and Gallant Man.