With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: One of Spider-Man 3's producers was an Israeli-American businessman.
text_B: In statistics and signal processing , a minimum mean square error -LRB- MMSE -RRB- estimator is an estimation method which minimizes the mean square error -LRB- MSE -RRB- , which is a common measure of estimator quality , of the fitted values of a dependent variable .. statistics. statistics. signal processing. signal processing. mean square error. mean square error. dependent variable. dependent variable. In the Bayesian setting , the term MMSE more specifically refers to estimation with quadratic loss function .. Bayesian. Bayesian estimator. loss function. loss function. In such case , the MMSE estimator is given by the posterior mean of the parameter to be estimated .. Since the posterior mean is cumbersome to calculate , the form of the MMSE estimator is usually constrained to be within a certain class of functions .. Linear MMSE estimators are a popular choice since they are easy to use , calculate , and very versatile .. It has given rise to many popular estimators such as the Wiener -- Kolmogorov filter and Kalman filter .. Kalman filter. Kalman filter
not_related.