 And so in the case of is it a fire, the first thing you do is you look at the spectral properties of the energy. And we know that a forest fire will have a particular spectral signature. You then look at other satellite data, particularly area burnt data, and using other satellites indeed. And then you go, well, at that location, around that time or after that time, we can see a fire scar on the landscape. So that gives you a tick.