Task ideas for Google Code-in/Add constraint-grammar rules

1. select a language pair that already uses constraint grammar for part-of-speech tagging, ideally such that the source language is a language you know (L₂) and the target language a language you use every day (L₁).
2. Install Apertium locally from the Subversion repository; install the language pair; make sure that it works and/or get Apertium VirtualBox and update, check out & compile the language pair.
3. Using a large enough corpus of the source language (e.g. plain text taken from Wikipedia, newspapers, literature, etc.) detect part-of-speech tagging errors (the translation is not adequate because the part-of-speech tagger in Apertium has selected the wrong morphological analysis for a word that had more than one);
4. write 10 constraint grammar rules that select the desired part of speech in the relevant context(s);
5. Compile and test again, possibly after retraining the statistical part-of-speech tagger
6. Submit a pull request (PR) on github, and give your mentor the url of the PR.