Answer the question at the end by quoting:

Hooker's date of birth is a subject of debate; the years 1912, 1915, 1917, 1920, and 1923 have been suggested. Most sources give 1917, though at times Hooker stated he was born in 1920. Information in the 1920 and 1930 censuses indicates that he was born in 1912. In 2017, a series of events took place to celebrate the purported centenary of his birth.
Hooker's recording career began in 1948, when Modern Records, based in Los Angeles, released a demo he had recorded for Bernie Besman in Detroit. The single, "Boogie Chillen'", became a hit and the best-selling race record of 1949. Despite being illiterate, Hooker was a prolific lyricist. In addition to adapting traditional blues lyrics, he composed original songs. In the 1950s, like many black musicians, Hooker earned little from record sales, and so he often recorded variations of his songs for different studios for an up-front fee. To evade his recording contract, he used various pseudonyms, including John Lee Booker (for Chess Records and Chance Records in 1951-1952), Johnny Lee (for De Luxe Records in 1953-1954), John Lee, John Lee Cooker, Texas Slim, Delta John, Birmingham Sam and his Magic Guitar, Johnny Williams, and the Boogie Man.  His early solo songs were recorded by Bernie Besman. Hooker rarely played with a standard beat, but instead he changed tempo to fit the needs of the song. This often made it difficult to use backing musicians, who were not accustomed to Hooker's musical vagaries. As a result, Besman recorded Hooker playing guitar, singing and stomping on a wooden pallet in time with the music.  For much of this period he recorded and toured with Eddie Kirkland. In Hooker's later sessions for Vee-Jay Records in Chicago, studio musicians accompanied him on most of his recordings, including Eddie Taylor, who could handle his musical idiosyncrasies. "Boom Boom" and "Dimples", two popular songs by Hooker, were originally released by Vee-Jay.

when did his career begin?

Hooker's recording career began in 1948,



Answer the question at the end by quoting:

Rowan & Martin's Laugh-In (often simply referred to as Laugh-In) is an American sketch comedy television program that ran for 140 episodes from January 22, 1968, to March 12, 1973, on the NBC television network. It was hosted by comedians Dan Rowan and Dick Martin. Laugh-In originally aired as a one-time special on September 9, 1967, and was such a success that it was brought back as a series, replacing The Man from U.N.C.L.E. on Mondays at 8 pm (ET). The title of the show was a play on the "love-ins" or "be-ins" of the 1960s hippie culture, terms that were, in turn, derived from "sit-ins", common in protests associated with civil rights and antiwar demonstrations of the time.
The 1970-71 season brought new additions to the cast include tall, lanky, sad-eyed Dennis Allen, who alternately played quietly zany characters and straight man for anybody's jokes; comic actress Ann Elder, who also contributed to scripts, tap dancer Barbara Sharma, and Johnny Brown.  Arte Johnson, who created many memorable characters, insisted on star billing, apart from the rest of the cast. The producer mollified him, but had announcer Gary Owens read Johnson's credit as a separate sentence: "Starring Dan Rowan and Dick Martin! And Arte Johnson! With Ruth Buzzi ..." This maneuver gave Johnson star billing, but made it sound like he was still part of the ensemble cast. Johnson left the show after the 1970-71 season. Henry Gibson also departed after the 1970-71 season. Johnson and he were replaced by former Hogan's Heroes stars Richard Dawson and Larry Hovis, both of whom had appeared occasionally in the first season. However, the loss of Johnson's many popular characters caused ratings to drop further.  After winning the Academy Award for Best Supporting Actress in Cactus Flower, Goldie Hawn made a guest appearance in the third episode of the fourth season. She began the episode as an arrogant snob of an actress; however, a bucket of water thrown at her transformed her back to her giggling dumb blonde persona.  The show celebrated its 100th episode during the 1971-72 season, with Carne, Worley, Johnson, Gibson, Graves, and Tiny Tim all returning for the festivities. John Wayne was on hand for his first cameo appearance since 1968.

did anyone else come on the show?
Richard Dawson and Larry Hovis, both of whom had appeared occasionally in the first season.