In particular, the following structure. And the way that we go from this truck to this structure is by moving these two electrons into the following pi bond. So these two lone pair of electrons can form a pi bond between the carbon and the nitrogen. And that kicks off this pi bond, these two electrons and places them onto that oxygen. And so we have a negative charge on the oxygen and a positive charge on this nitrogen. And the difference between this and this bond is in this case it's a single bond.