“…The topic of query-focused abstractive summarization has remained underexplored for the multi-document scenario as well (Kulkarni et al 2020). More importantly, the currently available query focused multi-document abstractive summarization (MD-QFAS) datasets (e.g., DUC 2 2005, 2006, 2007) do not contain any labeled training data, that is, these datasets only provide test data (Baumel, Eyal, and Elhadad 2018;Goodwin, Savery, and Demner-Fushman 2020;Su et al 2020;Xu and Lapata 2021). To tackle the lack of training data for the MD-QFAS task, most previous work was based on various unsupervised approaches that could only generate extractive summaries (Wang et al 2008;Haghighi and Vanderwende 2009;Wan and Xiao 2009;Yao, Wan, and Xiao 2015;Zhong et al 2015;Wan and Zhang 2014;Ma, Deng, and Yang 2016;Feigenblat et al 2017).…”