Given a research topic, some context related to the research topic, and a digest based on the topic, come up with a search query that can be used to collect more information on the research topic. The search query should seek to broaden understanding of the topic. The search query should address some missing piece of information, or line of further inquiry. The search query should diverge from the provided search queries, which are already being pursued. The search query should be different than any of the existing search queries. Output only the search query. Do not output any prefix or suffix to the search query.
**Research Topic**
{research_topic}
**Context**
{context}
**Existing Search Queries**
{search_queries}
**Digest**
{digest}