Future agendas in urban tourism research: special editorial. Issue 2 (20th June 2019) - Šegota, Tina; Sigala, Marianna; Gretzel, Ulrike; Day, Jonathon; Kokkranikal, Jithendran; Smith, Melanie; Seabra, Claudia; Pearce, Philip; Davidson, Rob; van Zyl, Cine; Newsome, David; Hardcastle, James; et al.