 But I had this sort of crazy notion that I wanted to go back and do a master's. So I left six years later, having done mostly project finance, so financing big projects. We did a gold mine in Ghana. We did a petrochemical work in what was then the Soviet Union, which is quite innovative to be bringing Western capital into the Soviet Union in the 80s and the Gorbachev days. And you were drawn to demography. What is demography first? Let's start with the basics.