is a distribution over which ones start in which ones to end ok this one's probably a start and this one's probably the end so that's how you predict the span and again what you have to ultimately learn is these these queries here and so not that much and this is named entity recognition and named entity recognition you have a sentence and you're supposed to recognize named entities like up here we saw subscribe to PewDiePie and the named entity would be PewDiePie right this is a name and you're supposed to recognize that this is a name and