If you like this tool, please cite our works:

Bartoli, De Lorenzo, Medvet, Tarlao, Inference of Regular Expressions for Text Extraction from Examples, IEEE Transactions on Knowledge and Data Engineering (TKDE), 2016 Bartoli, De Lorenzo, Medvet, Tarlao, Learning Text Patterns using Separate-and-Conquer Genetic Programming, 18th European Conference on Genetic Programming (EuroGP)), 2015, Copenhagen (Denmark)

The source code is available on GitHub