“…First, Natural Language Processing and Opinion Mining techniques may be applied to analyze the citizens comments on proposals. Among others, opinion lexicons (Hubert et al, 2018), controversy vocabularies (Mejova et al, 2014;Roitman et al, 2016), language models (Jang et al, 2016) and word embeddings (Rethmeier et al, 2018), and argument extraction methods and tools (Shum et al, 2008;Lytos et al, 2019;Dutta et al, 2019) could be used to extract statements and claims in favor and against each proposal, and hence, achieving a better understanding of the most important and urgent citizen needs, as well as the underlying discussions and controversies. Moreover, applying machine learning to automatically classify and predict the relevance and levels of discussion and controversy (Jang et al, 2016;Rad and Barbosa, 2012) of citizen proposals represents a research line whose results would be of special interest for government decision and policy making.…”