Abstract: Approaches for facilitating queries of a topic-based-source-specific search system using entity mention filters and search tools relating to search strategies are disclosed. In certain implementations, an input relating to a query may be received. One or more predefined sources and information items may be determined based on the received input. In some implementations, the system may be configured to apply one or more user-selected entity mention filters to determine information items and sources that are associated with one or more predefined entities or their corresponding aliases. In some implementations, the system may be configured to retrieve information items with corresponding sources that relate to a predefined source set of a search tool.

Abstract: Approaches for facilitating queries of a topic-based-source-specific search system using key term clusters relating to key terms contained within information items. In certain implementations, an input relating to a query may be received. One or more predefined sources and information items may be determined based on the received input. In some implementations, the system may be configured determine one or more key terms from the information items and to display the one or more key terms in a key term cluster. The visual representations, such as color, size, shape, position, and area, of the key terms in the key term cluster may depend on information relating to the corresponding key terms.

Abstract: Approaches for facilitating queries of a topic-based-source-specific search system using entity mention filters and search tools relating to search strategies are disclosed. In certain implementations, an input relating to a query may be received. One or more predefined sources and information items may be determined based on the received input. In some implementations, the system may be configured to apply one or more user-selected entity mention filters to determine information items and sources that are associated with one or more predefined entities or their corresponding aliases. In some implementations, the system may be configured to retrieve information items with corresponding sources that relate to a predefined source set of a search tool.