Question:
Ernest Edward "Ernie" Kovacs (January 23, 1919 - January 13, 1962) was an American comedian, actor, and writer. Kovacs's visually experimental and often spontaneous comedic style influenced numerous television comedy programs for years after his death. Many individuals and shows, such as Johnny Carson, David Letterman, Rowan and Martin's Laugh-In, Saturday Night Live, Monty Python's Flying Circus, Jim Henson, Max Headroom, Chevy Chase, Conan O'Brien, Jimmy Kimmel, Captain Kangaroo, Sesame Street, The Electric Company, Dave Garroway, Uncle Floyd, and many others have credited Kovacs as an influence. Chevy Chase thanked Kovacs during his acceptance speech for his Emmy award for Saturday Night Live.
Kovacs's father Andrew emigrated from Hungary at age 13. He worked as a policeman, restaurateur, and bootlegger; the last so successfully that he moved his wife Mary, and sons Tom and Ernie, into a 20-room mansion in the better part of Trenton. Though a poor student, Kovacs was influenced by his Trenton Central High School drama teacher, Harold Van Kirk, and received an acting scholarship to the American Academy of Dramatic Arts in 1937 with Van Kirk's help. The end of Prohibition and the Depression resulted in difficult financial times for the family. When Kovacs began drama school, all he could afford was a fifth floor walk-up apartment on West 74th Street in New York City. During this time, he watched many "Grade B" movies; admission was only ten cents. Many of these movies influenced his comedy routines later. A 1938 local newspaper photograph shows Kovacs as a member of the Prospect Players, not yet wearing his trademark mustache. Like any aspiring actor, Kovacs used his class vacation time to pursue roles in summer stock companies. While working in Vermont during 1939, he became so seriously ill with pneumonia and pleurisy that his doctors didn't expect him to survive. During the next year and a half, his comedic talents developed as he entertained both doctors and patients with his antics during stays at several hospitals. While hospitalized, Kovacs developed a lifelong love of classical music by the gift of a radio, which he kept tuned to WQXR. By the time he was released, his parents had separated, and Kovacs went back to Trenton, living with his mother in a two-room apartment over a store. He began work as a cigar salesman, which resulted in a lifelong cigar-smoking habit. Kovacs's first paid entertainment work was during 1941, as an announcer for Trenton's radio station WTTM. He spent the next nine years with WTTM, becoming the station's director of Special Events; in this job he did things like trying to see what it was like to be run over by a train (leaving the tracks at the last minute) and broadcasting from the cockpit of a plane for which he took flying lessons. Kovacs was also involved with local theater; a local newspaper published a photograph of him and the news that he was doing some directing for the Trenton Players Guild in early 1941. The Trentonian, a local weekly newspaper, offered Kovacs a column in June 1945; he named it "Kovacs Unlimited".
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who did he work with?

Answer:
Harold Van Kirk,

Answer the question at the end by quoting:

Tha Dogg Pound is an American hip hop duo formed in 1992, made up of West Coast rappers Kurupt and Daz Dillinger (formerly Dat Nigga Daz). They were signed to Death Row Records in their early careers and were key to the label's success. The duo made their first appearance on Dr. Dre's highly acclaimed debut album The Chronic (1992), appearing on several songs. They also appeared on Snoop Dogg's debut album Doggystyle (1993), and the Death Row soundtracks Murder Was the Case and Above the Rim.
Over the years Tha Dogg Pound had beef with Bone Thugs-N-Harmony, due to Death Row Records being embroiled in a feud with Eazy-E's Ruthless Records. Tha Dogg Pound made a diss towards The Bone Thugs, on the song "Dogg Pound Gangstaz", with Kurupt's line "Ain't got no love for no hoes in harmony." In response Layzie Bone shot back on the track "Shotz to tha Double Glock" with the line "Dogg Pound hoes it's on." "Krayzie Bone says "Gotta find these 'Row Hoes" in the song "Mo' Murda" off the East 99 album. The feud ended when Snoop Dogg and Kurupt were featured on Krayzie Bone's album Thug Mentality 1999 in the song "The War Iz On." Kurupt was featured on Flesh-N-Bone's song "Kurupted Flesh" on the 5th Dog Let Loose. Krayzie Bone also featured on Daz Dillinger's 2008 solo album Only on the Left Side on the song "Meal Ticket" and later on the song "Money Fold'N" on Tha Dogg Pound's 2009 album That Was Then, This Is Now. Tha Dogg Pound were also involved in a feud with B.G. Knocc Out & Dresta. In response to Eazy-E's Real Muthaphukkin G's and Kokane & Cold 187um's "Don't Bite The Funk", Tha Dogg Pound along with Snoop Dogg made a track called "What Would You Do" with such lines as: "Fuck B.G. Knocc Out and every nigga down with him." Later B.G. Knocc Out & Dresta retaliated with the song "D.P.G. Killa", on their debut album Real Brothas. They have since squashed the beef and released a song called "Blaze It Up", as a bonus track on Tha Dogg Pound's Dogg Chit album. The duo engaged in yet another conflict, the beef Suge and new signee 2Pac initiated against Bad Boy Entertainment's Puff Daddy and Notorious B.I.G.; Daz and Kurupt would expand the feud to include Capone-N-Noreaga, Tragedy Khadafi and Mobb Deep with their Snoop-assisted single "New York, New York."

What is an example of an external matter?
Tha Dogg Pound had beef with Bone Thugs-N-Harmony,