class_docstr: Loads the NQ Sample data for testing purposes.
class_docstr_tok: ["Loads","the","NQ","Sample","data","for","testing","purposes","."]
code: def _get_fname(self, chunk_idx: int) -> str:
      return f"nq-{self.dtype}-sample.jsonl"
  
imports: import copy
  import os
  import json
  import jsonlines
  from typing import List, Optional, Tuple
  from parlai.core.teachers import ChunkTeacher, DialogTeacher
  from .build import build, DATASET_NAME_LOCAL, build_sample
  from .build_open import build
  from .utils.text_utils import simplify_nq_example
  from parlai.core.opt import Opt
  from parlai.core.message import Message
  from parlai.core.metrics import ExactMatchMetric, normalize_answer, AverageMetric
  from parlai.core.params import ParlaiParser
  from parlai.utils.data import DatatypeHelper
  from parlai.utils.io import PathManager
  import parlai.utils.logging
label_desc: Use image node_id 2 for calling the NaturalQuestionsSampleTeacher obj's underlying member method code with example usage: obj._get_fname(chunk_idx) and returns: str, self, str