Analyzing Factual Recall in a Dual-Stream Language Model

A diagram of a language model's inference process shows two parallel streams originating from a single query vector. The first stream processes the query against a local cache of recent context to produce a probability distribution. The second stream uses the same query to search a large external datastore, retrieving similar past examples to form a second probability distribution. Finally, these two distributions are combined for the final prediction. What is the primary advantage of this dual-stream architecture as depicted?

A diagram of a k-NN Language Model's inference process shows several key components. Match each component with its correct function in the process.