you want to do first is your first one it take the large data set terrain this network right here and then in a second step fine-tune the network on this smaller data set and you sort of hope that what you learned from the large data set right here transfers over a little bit of knowledge you already have a little bit of knowledge and you can make better use of the data that you have right here now the question is how do you do this pre training and of course this has a long tradition well long for maybe two or three years right