| CPC G10L 15/063 (2013.01) [G10L 15/16 (2013.01)] | 6 Claims |

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1. A method of training a conversation model in an electronic apparatus, the method comprising:
identifying a first context;
identifying a first response set corresponding to the first context based on a first model;
excluding, from the first response set, at least one response that exists outside a first range in an embedding space from a gold response corresponding to the first context, wherein the first range is determined based on a k-means algorithm or a k-Nearest Neighbor (kNN) algorithm;
excluding, from the first response set, at least another response that is included in a second range in the embedding space from the gold response, wherein the second range indicates a Jaccard Filter Boundary in the embedding space;
identifying a response subset including a plurality of responses selected from the first response set based on the gold response;
calculate relevance scores, each relevance score indicating a degree of relevance to the gold response for a response in the plurality of responses; and
training a second model based on the first context, the response subset, and the relevance scores.
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