Complex sentence: The current "incarnation" was founded by president Bartolomé Mitre in 1863 under the name of "Colegio Nacional", and since 1911 the school has been a part of the University of Buenos Aires.
Split into simpler sentences: The current "incarnation" was founded by president Bartolomé Mitre in 1863. Since 1911 the school has been a part of the University of Buenos Aires.