Education in Mexico in a country where English is one of the official languages, offers an English-medium curriculum other than the country’s national curriculum and is international in its orientation." This definition is used by publications including The Economist. In central Mexico, the history of education stretches back to the prehispanic era, with the education of Nahuas in schools for elites and commoners. A formal system of writing was created in various parts of central and southern Mexico, with trained experts in its practice. After the Spanish conquest of the Aztec Empire, friars embarked on a widespread program of evangelization of Christianity. In
What Is Life about it …" In September 2014, this instrumental version also appeared as a bonus track on the 2014 "Apple Years 1968–75" reissue of "All Things Must Pass".<ref name="Marchese/SecondDisc">Joe Marchese, "Give Me Love: George Harrison’s 'Apple Years' Are Collected On New Box Set", The Second Disc, 2 September 2014 (retrieved 26 September 2014).</ref> Coinciding with the release, Harrison's widow and son, Olivia and Dhani, held an online competition in which filmmakers were invited to create a video clip for "What Is Life". The winner received a $5000 cash prize and their entry became the official video for the track, appearing on