docstr: :see: ReadingCommand.to_fol()
code: def to_fol(self, expression):
      """:see: ReadingCommand.to_fol()"""
      return expression
  
imports: import os
  from abc import ABCMeta, abstractmethod
  from functools import reduce
  from operator import add, and_
  from nltk.data import show_cfg
  from nltk.inference.mace import MaceCommand
  from nltk.inference.prover9 import Prover9Command
  from nltk.parse import load_parser
  from nltk.parse.malt import MaltParser
  from nltk.sem.drt import AnaphoraResolutionException, resolve_anaphora
  from nltk.sem.glue import DrtGlue
  from nltk.sem.logic import Expression
  from nltk.tag import RegexpTagger
label_desc: Use image node_id 4 for calling the CfgReadingCommand obj's underlying member method code with example usage: obj.to_fol(expression) and returns: expression