ner_tags: O O O O O O O O B-Person I-Person O O O O O B-Organization O O O O O O O O O O O O O O O O O O O O O O O O O B-Person O O O O O B-Organization I-Organization I-Organization I-Organization B-Organization O B-Grant B-Person O O O O B-Organization O B-Grant
tokens: This paper is dedicated to the memory of Janusz Kaluzny, founder and long-time leader of CASE, who prematurely passed away in March 2015. We thank an anonymous referee for very insightful remarks that significantly improved the final shape of the paper. A.A.P. acknowledges partial support from the Polish National Science Center (NCN) grant 2015/17/B/ST9/02082. M.R. was supported by the NCN grant DEC-2012/05/B/ST9/03931.