“…In the future, datasets with documents of rich diversity are desperately required to promote the research of multi-document summarization. Meanwhile, according to application requirements, datasets in cross-domains are ought to be collected, for example, medical records or dialogue summarization [86], email summarization [124,145], code summarization [80,108], software project activities summarization [2], legal documents summarization [57]. The development of large-scale cross-task datasets will facilitate multi-task learning [34,135].…”