Selection and processing of calibration samples to measure the particle identification performance of the LHCb experiment in Run 2 oleh Roel Aaij, Lucio Anderlini, Sean Benson, Marco Cattaneo, Philippe Charpentier, Marco Clemencic, Antonio Falabella, Fabio Ferrari, Marianna Fontana, Vladimir Vava Gligorov, Donal Hill, Tibaud Humair, Christopher Robert Jones, Oliver Lupton, Sneha Malde, Carla Marin Benito, Rosen Matev, Alex Pearce, Anton Poluektov, Barbara Sciascia, Federico Stagni, Ricardo Vazquez Gomez, Yanxi Zhang