class_docstr: Dataset for conceptual caption database
class_docstr_tok: ["Dataset","for","conceptual","caption","database"]
code: def __getitem__(self, idx):
      df_i = self.data.iloc[idx]
      data = {
          "sentences": [df_i["caption"]],
          "image_path": df_i["file"],
      }
      return data
  
file_path: mmf/mmf/datasets/builders/retrieval/datasets.py
imports: import json
  import pandas
  import torch
  from mmf.utils.file_io import PathManager
label_desc: Use image node_id 2 for calling the ConceptualCaptionsDatabase obj's underlying member method code with example usage: obj.__getitem__(idx) and returns: data