With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Dan Martin was born August 20th, 1986.
text_B: In statistics , a regression diagnostic is one of a set of procedures available for regression analysis that seek to assess the validity of a model in any of a number of different ways .. statistics. statistics. regression analysis. regression analysis. This assessment may be an exploration of the model 's underlying statistical assumptions , an examination of the structure of the model by considering formulations that have fewer , more or different explanatory variables , or a study of subgroups of observations , looking for those that are either poorly represented by the model -LRB- outliers -RRB- or that have a relatively large effect on the regression model 's predictions .. explanatory variables. dependent and independent variables. A regression diagnostic may take the form of a graphical result , informal quantitative results or a formal statistical hypothesis test , each of which provides guidance for further stages of a regression analysis .. regression analysis. regression analysis. statistical hypothesis test. statistical hypothesis test
not_related.