examples/research_projects/longform-qa/eli5_app.py/find_nearest_training
def find_nearest_training(question, n_results=10):
    q_rep = embed_questions_for_retrieval([question], qar_tokenizer, qar_model)
    D, I = eli5_train_q_index.search(q_rep, n_results)
    nn_examples = [eli5_train[int(i)] for i in I[0]]
    return nn_examples