Professor Siebrasse, at the very end of your opening remarks you talked about patent trolls. I want to pursue that. You indicated, if I recollect correctly, that patent trolls are an issue in the U.S. that hasn't really affected Canada yet, and you hope that this continues to be the case.
Could you explain what patent trolls are? Also, what can we do or not do to ensure that it remains a non-issue in our jurisdiction?