“…There is a long history of competitions focused on NLU/G tasks. Especially in recent years we have seen a large number of challenges dedicated to open-domain dialog systems [Hauff et al, 2021, Dalton et al, 2020, Spina et al, 2019, Chuklin et al, 2018, such as ConvAI [Burtsev and Logacheva, 2020], ConvAI2 , ConvAI3: Clarifying Questions for Open-Domain Dialogue Systems (ClariQ) [Aliannejadi et al, 2020[Aliannejadi et al, , 2021, as well as a series of competitions of the Alexa Prize 5 . There are great efforts in the community to advance task-oriented dialogs by suggesting competitions, such as the Dialog System Technology Challenge (DSTC-8) [Kim et al, 2019]; benchmarks and experimental platforms, e.g., Convlab, which offers the annotated MultiWOZ dataset [Budzianowski et al, 2018] and associated pre-trained reference models .…”