Machine Learning, Optimization, and Data Science 5th International Conference, LOD 2019, Siena, Italy, September 10-13, 2019, Proceedings - Nicosia, Giuseppe; Nicosia, Giuseppe; Pardalos, Panos; Pardalos, Panos; Umeton, Renato; Umeton, Renato; Giuffrida, Giovanni; Giuffrida, Giovanni; Sciacca, Vincenzo; Sciacca, Vincenzo (Springer International Publishing : Imprint: Springer, 2019)