15. The computer program product of claim 14 , wherein the F-Measure is determined based on at least one of: a set of labeled matches used as training data; and a set of labeled matches used as validation data.
15. The computer program product of claim 14 , wherein the F-Measure is determined based on at least one of: a set of labeled matches used as training data; and a set of labeled matches used as validation data. 17. The computer program product of claim 15 , wherein selecting the candidate regular expression from the pool of candidate regular expressions with the best F-Measure comprises: iteratively comparing the F-Measure of a current candidate regular expression to the F-Measure of a previous candidate regular expression for the set of labeled matches used as training data; in response to the F-Measure of the previous candidate regular expression being better than the F-Measure of the current candidate regular expression for the set of labeled matches used as training data, outputting the previous candidate regular expression; iteratively comparing the F-Measure of the current candidate regular expression to the F-Measure of the previous candidate regular expression for the set of labeled matches used as validation data; and in response to the F-Measure of the previous candidate regular expression being better than the F-Measure of the current candidate regular expression for the set of labeled matches used as validation data, outputting the previous candidate regular expression.