Figure 2: F-measure over time for test set 98b with configurations: As can be seen, there is a small gain in performance by using seeds within the epoch of the test set, but the decay is still observable as we increase the time gap between the unlabeled data and the test set.
(2008) also observed a decaying tendency in the performance of a system for recovering capitalization over a period of six years, proposing to retrain a MaxEnt model using additional contemporary written texts.