Complex sentence: Driven by ambition and nostalgia, Oskar Bider returned in 1912 to Europe and joined, on November 8, Blériot's aviation school in Pau, situated in the northern Pyrenees.
Split into simpler sentences: Driven by ambition and nostalgia, Oskar returned to Europe in 1912. On November 8 of that year he joined Blériot's aviation school in Pau, situated in the northern Pyrenees.