It's based on open source analysis, sir. What we do is we systematically analyze any data that is available in the open source. We read not only current affairs, not only the newspapers, but also historical records.
For your information, the interesting thing about the Iranian political system is that there is a relative degree of openness. It is not like North Korea. Statesmen write their memoirs. From the memoirs you can extract information and data. That information gives you a wealth of data.