1. A processor, and a memory device configured with instructions, which when executed by the processor, cause the processor to enable a system, the system comprising: a data structure of lists of entities of query and entity relationships extracted from a search entity data source, the data structure having different levels of hierarchy; and a search user interface that enables browsing of the lists of entities of the data structure as related to a specific query, wherein the lists are presented as a scrollable set of interactive elements expandable into scrollable sub-lists and interactive entities.