Answer: A scientist who had a big impact.
Probably after the Anschluss. Although Hitler had already violated the Treaty of Versaille by rebuilding Germany's military and moving troops into the Rhineland, the annexation of Austria was the first big territory takeovers and as a result of the Allies inability to punish Hitler for this violation of the Treaty of Versaille, it allowed him the momentum to quickly overtake Lithuania, Bohemia, Moravia, and Czechoslovakia. Which of course leads up to the invasion of Poland.
The Swahili language was a language that was actually very well in connecting people from different places, and it was a language that enabled communication between lots of people from different backgrounds. The Swahili language is actually a language that has its basis in the Bantu, but over time, because of the constant communication with lots of people that came in this part of Africa to trade, the language incorporated lots of words and phrases from other languages, so it became a mixed language that lots of people started using for mutual communication.
It is in Iran because thats where they were born or started