Norte and Diagonal Sur, paving Avenida General Paz, widening Avenida Corrientes, constructing the first stretch of 9 de Julio Avenue and building the Obelisco de Buenos Aires. The substitution of Hueyo by the socialist Frederico Pinedo would mark a change in the political scene in the government. The intervention of the government in the economy was more significant, creating the Junta Nacional de Granos, or the National Grain Committee, and of Meat, and soon after, with the advice of English economist Otto Niemeyer, the creation of the Banco Central de la República Argentina, or the Central Bank of the Argentine Republic. Relationship with the UCR The radical opposition was very significant. On 5 April 1931, the political ideology of the supporters of Yrigoyen had won the election for governor in the province of Buenos Aires against the hopes of Uriburu and Sánchez Sorondo; though the military government rings, cost the career of the Minister and forced Uriburu to give up his power. Before this, soldiers loyal to the constitutional government of Yrigoyen, with the support of armed civilians, organized insurrections to restore that earlier government. The first of these was directed by the Yrigoyenist general Severino Toranzo in February 1931. In June, in Curuzú Cuatiá in the province of Corrientes, they assassinated Colonel Regino Lescano, who was preparing a Yrigoyenist mobilization. In December, before an attempted coup led by Lieutenant Colonel Atilio Cattáneo, Justo decreed a state of siege, and again imprisoned the old Yrigoyen, and also arrested Alvear, Ricardo Rojas, Honorio Pueyrredón, and other leaders of the party. In 1933, the attempted coups continued. Buenos Aires, Corrientes, Entre Rios, and Misiones would be the stage of radical uprisings, which would not end before more than a thousand people being detained. Seriously ill, Yrigoyen was returned to Buenos Aires and kept under house arrest. He died on June 3, and his burial in La Recoleta Cemetery was an occasion of a mass demonstration. In December, during a meeting of the national convention of the UCR, a joint uprising of the military and politicians broke loose in Santa Fe, Rosario, and Paso de los Libres. José Benjamin Abalos, who was Yrigoyen's ex-Minister, and Colonel Roberto Bosch were arrested during the uprising and the organizers and leaders of the party were imprisoned at Martín García. Alvear, Justo's former patron, was exiled, while others were detained in the penitentiary in Ushuaia. Roca-Runciman Treaty