ner_tags: B-Person O B-Person O O O O O B-Organization I-Organization I-Organization B-Grant B-Person O O O O B-Organization B-Grant I-Grant I-Grant O O O B-Grant I-Grant I-Grant I-Grant I-Grant O O O O O O O O O O O O O O O
tokens: M.P. and F.M. acknowledge financial support from the University of Trieste (FRA2016). F.C. acknowledges funding from the INAF PRIN-SKA2017 program 1.05.01.88.04 and from grant PRIN MIUR 2017 - 20173ML3WW_001. The authors thank an anonymous referee for careful reading of the manuscript and useful suggestions.