code: def load_annotation_db(self, path):
      # Expect two paths, one to questions and one to annotations
      assert (
          len(path) == 2
      ), "OKVQA requires 2 paths; one to questions and one to annotations"
  
      with open(path[0]) as f:
          path_0 = json.load(f)
      with open(path[1]) as f:
          path_1 = json.load(f)
  
      if "annotations" in path_0:
          annotations = path_0
          questions = path_1
      else:
          annotations = path_1
          questions = path_0
  
      # Convert to linear format
      data = []
      question_dict = {}
      for question in questions["questions"]:
          question_dict[question["question_id"]] = question["question"]
  
      for annotation in annotations["annotations"]:
          annotation["question"] = question_dict[
              annotation["question_id"]
          ]
          answers = []
          for answer in annotation["answers"]:
              answers.append(answer["answer"])
          annotation["answers"] = answers
          data.append(copy.deepcopy(annotation))
  
      self.data = data
  
imports: import copy
  import json
  from mmf.datasets.databases.annotation_database import AnnotationDatabase
  from mmf.utils.general import get_absolute_path
label_desc: Use image node_id 2 for calling the OKVQAAnnotationDatabase obj's underlying member method code with example usage: obj.load_annotation_db(path) without return types