<prompt> Hlalosa mohopolo oa mokhoa oa ho khutlisa o thehiloeng ho tsebetso ea puo ea tlhaho.nan  <response>: Instruction in English: Explain the concept of the retrieval-based model for natural language processing. . Response in English: Retrieval-based models are one of the approaches used in natural language processing, especially for tasks such as dialogue systems or chatbots. As the name suggests, these models work by retrieving pre-defined responses based on the input query from the user. In contrast to generative models which generate new responses from scratch, retrieval-based models have a predefined set of responses, often organized in a database or knowledge base, from which the most appropriate response is selected and presented to the user.The process starts with an input, typically in the form of user query or utterance. The model then processes the input, extracting its meaning and intent using natural language processing techniques. The next step is to search the database for the most relevant or appropriate response, matching the inputs intent. The matching process is typically done using similarity metrics, such as cosine similarity, which compare the input query to the potential responses based on their semantic meaning. Once a suitable response is identified, its retrieved and presented to the user.Retrieval-based models have some advantages, such as providing fluent and grammatically correct responses and being relatively easy to implement. However, they have limitations in terms of flexibility, as the responses are limited to the predefined set, and may struggle to handle new or unique queries, for which there is no matching response in the database. . Response in Sesotho: Mehlala e thehiloeng ho boipiletso ke e ngoe ea mekhoa e sebelisoang tsebetsong ea puo ea tlhaho, haholo bakeng sa mesebetsi e kang litsamaiso tsa lipuisano kapa li-chatbots. Joalo ka ha lebitso le fana ka maikutlo, mehlala ena e sebetsa ka ho khutlisa likarabo tse boletsoeng esale pele tse ipapisitseng le potso ea tlhahiso ho tsoa ho mosebelisi. Ho fapana le mefuta e hlahisoang e hlahisang likarabo tse ncha ho tloha qalong, mefuta e thehiloeng ho ho khutlisa e na le likarabelo tse boletsoeng esale pele, tseo hangata li hlophisitsoeng sebakeng sa polokelo ea litaba kapa setsing sa tsebo, moo karabo e nepahetseng ka ho fetisisa e khethoang le ho hlahisoa ho mosebelisi. Tsebetso e qala ka ho kenya letsoho, hangata ka mokhoa oa potso ea mosebelisi kapa polelo. Joale mohlala o sebetsana le ho kenya, ho ntša moelelo le sepheo sa oona ka ho sebelisa mekhoa ea tlhaho ea ho sebetsana le puo. Mohato o latelang ke ho batlisisa polokelongtshedimosetso bakeng sa karabo e nepahetseng kapa e nepahetseng, e tsamaellanang le sepheo sa tlhahiso. Tsebetso ea ho nyallana hangata e etsoa ho sebelisoa metrics ea ho tšoana, joalo ka ho tšoana ha cosine, e bapisang potso ea ho kenya le likarabo tse ka bang teng ho ipapisitse le moelelo oa tsona oa mantsoe. Hang ha karabo e nepahetseng e khethiloe, e tla khutlisoa ebe e hlahisoa ho mosebelisi. Mehlala e thehiloeng ho phuputso e na le melemo e itseng, joalo ka ho fana ka likarabo tse hlakileng le tse nepahetseng tsa puo le ho ba bonolo ho e sebelisa. Leha ho le joalo, ba na le mefokolo mabapi le ho feto-fetoha ha maemo, kaha likarabo li lekanyelitsoe ho sete e boletsoeng esale pele, me li ka na tsa thatafalloa ho sebetsana le lipotso tse ncha kapa tse ikhethang, tseo ho tsona ho se nang karabo e tsoanang ho database. 