We have one electron left over here, one electron left over here that is used to actually generate a pi bond. So going from this molecule to this molecule, we ultimately form a double bond. Now, once we form the double bond, the next step is a hydration step. And what that ultimately tries to achieve is to attach a hydroxyl group onto this carbon here. So going from here to here, we break that pi bond and we also attach that hydroxyl group, as shown here. So this gives us an alcohol group in the next step, which is once again, an oxidation step.