Pre-processed benchmark set 2

Partalas, I., G. Balikas, N. Baskiotis, D. Polychronopoulos, Y. Almirantis, E. Gaussier, T. Artieres, and P. Gallinari, "Pre-processed benchmark set 2", BioASQ, Project deliverable D3.8 and D4.6, March, 2014.