“…Query by document (QBD) [38,37], is a widely-used practice across professional, domain-specific retrieval tasks [33,35] such as scientific literature retrieval [25,9], legal case law retrieval [2,3,30,34], and patent prior art retrieval [13,28]. In these tasks, the user's information need is based on a seed document of the same type as the documents in the collection.…”