func main() {
    ctx := context.Background()
    apiKey := os.Getenv("OPENAI_API_KEY")
    encoder := gptbot.NewOpenAIEncoder(apiKey, "")
    store := gptbot.NewLocalVectorStore()

    // Feed documents into the vector store.
    feeder := gptbot.NewFeeder(&gptbot.FeederConfig{
        Encoder: encoder,
        Updater: store,
    })
    err := feeder.Feed(ctx, &gptbot.Document{
        ID:   "1",
        Text: "Generative Pre-trained Transformer 3 (GPT-3) is an autoregressive language model released in 2020 that uses deep learning to produce human-like text. Given an initial text as prompt, it will produce text that continues the prompt.",
    })
    if err != nil {
        fmt.Printf("err: %v", err)
        return
    }

    // Chat with the bot to get answers.
    bot := gptbot.NewBot(&gptbot.BotConfig{
        APIKey:  apiKey,
        Encoder: encoder,
        Querier: store,
    })

    question := "When was GPT-3 released?"
    answer, _, err := bot.Chat(ctx, question)
    if err != nil {
        fmt.Printf("err: %v", err)
        return
    }
    fmt.Printf("Q: %s\n", question)
    fmt.Printf("A: %s\n", answer)

    // Output:
    //
    // Q: When was GPT-3 released?
    // A: GPT-3 was released in 2020.
}