always super well separate and you retrieve a single pattern and that's what they research here in a pre-trained bert model so they take a pre-trained model from i guess from hogging face and they run they just run a data set through it and what they do is so for each for each query and sorry for each attention head because you have multiple ones of these attention heads right um in each layer so in each layer you have multiple ones of these heads for each head they look at over the course of the whole data set