Universal owned the rights to the "Oswald the Lucky Rabbit" character, although Walt Disney and Ub Iwerks had created Oswald, and their films had enjoyed a successful theatrical run. After Charles Mintz had unsuccessfully demanded that Disney accept a lower fee for producing the property, Mintz produced the films with his own group of animators. Instead, Disney and Iwerks created Mickey Mouse who in 1928 stared in the first "sync" sound animated short, Steamboat Willie. This moment effectively launched Walt Disney Studios' foothold, while Universal became a minor player in film animation. Universal subsequently severed its link to Mintz and formed its own in-house animation studio to produce Oswald cartoons headed by Walter Lantz.
What was the first animated short with synchronized sound?
Steamboat Willie

Though almost any variety of acoustic mandolin might be adequate for Irish traditional music, virtually all Irish players prefer flat-backed instruments with oval sound holes to the Italian-style bowl-back mandolins or the carved-top mandolins with f-holes favoured by bluegrass mandolinists. The former are often too soft-toned to hold their own in a session (as well as having a tendency to not stay in place on the player's lap), whilst the latter tend to sound harsh and overbearing to the traditional ear. The f-hole mandolin, however, does come into its own in a traditional session, where its brighter tone cuts through the sonic clutter of a pub. Greatly preferred for formal performance and recording are flat-topped "Irish-style" mandolins (reminiscent of the WWI-era Martin Army-Navy mandolin) and carved (arch) top mandolins with oval soundholes, such as the Gibson A-style of the 1920s.
What was the Irish style mandolin reminiscent of?
WWI-era Martin Army-Navy mandolin

Increasing state control over the oil sector, the RCC began a program of nationalization, starting with the expropriation of British Petroleum's share of the British Petroleum-N.B. Hunt Sahir Field in December 1971. In September 1973, it was announced that all foreign oil producers active in Libya were to be nationalized. For Gaddafi, this was an important step towards socialism. It proved an economic success; while gross domestic product had been $3.8 billion in 1969, it had risen to $13.7 billion in 1974, and $24.5 billion in 1979. In turn, the Libyans' standard of life greatly improved over the first decade of Gaddafi's administration, and by 1979 the average per-capita income was at $8,170, up from $40 in 1951; this was above the average of many industrialized countries like Italy and the U.K.
What company's property did Libya nationalize in December of 1971?
British Petroleum