As David Pesetsky turns 60, the contributions he has made to the field of linguistics are substantial. This volume celebrates his career, and in particular, the

Ms. Lesky's second grade class wants to stomp like trolls, dance like trolls, and even sneeze like trolls-they have trolls on the brain!

This book constitutes the refereed proceedings of the 11th Algorithms and Data Structures Symposium, WADS 2009, held in Banff, Canada, in August 2009. The Algor