class_docstr: FUNSD Text Detection Annotation Parser. See
  dataset_zoo/funsd/sample_anno.md for annotation example.
  
  Args:
      nproc (int): The number of processes to parse the annotation. Defaults
          to 1.
docstr: Parse single annotation.
code: def parse_file(self, img_path: str, ann_path: str) -> Tuple:
      """Parse single annotation."""
      instances = list()
      for poly, text, ignore in self.loader(ann_path):
          instances.append(dict(poly=poly, text=text, ignore=ignore))
  
      return img_path, instances
  
file_path: mmocr/mmocr/datasets/preparers/parsers/funsd_parser.py
imports: import json
  from typing import Tuple
  from mmocr.registry import DATA_PARSERS
  from mmocr.utils import bbox2poly
  from .base import BaseParser
label_desc: Use image node_id 1 for calling the FUNSDTextDetAnnParser obj's underlying member method code with example usage: obj.parse_file(img_path, ann_path) and returns: img_path,  instances