import { OpenAI } from "langchain/llms/openai";
import { loadQAMapReduceChain } from "langchain/chains";
import { Document } from "langchain/document";

// Optionally limit the number of concurrent requests to the language model.
const model = new OpenAI({ temperature: 0, maxConcurrency: 10 });
const chain = loadQAMapReduceChain(model);
const docs = [
  new Document({ pageContent: "harrison went to harvard" }),
  new Document({ pageContent: "ankush went to princeton" }),
];
const res = await chain.call({
  input_documents: docs,
  question: "Where did harrison go to college",
});
console.log({ res });