code: def english_lower(s):
      """Apply English case rules to convert ASCII strings to all lower case.
  
      This is an internal utility function to replace calls to str.lower() such
      that we can avoid changing behavior with changing locales. In particular,
      Turkish has distinct dotted and dotless variants of the Latin letter "I" in
      both lowercase and uppercase. Thus, "I".lower() != "i" in a "tr" locale.
  
      Parameters
      ----------
      s : str
  
      Returns
      -------
      lowered : str
  
      Examples
      --------
      >>> from numpy.core.numerictypes import english_lower
      >>> english_lower('ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_')
      'abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz0123456789_'
      >>> english_lower('')
      ''
      """
      lowered = s.translate(LOWER_TABLE)
      return lowered
  
label_desc: Use image node_id 1 for calling a global function with example usage: english_lower(s) and returns: lowered