code: def iso_639_2_from_3(iso3: str) -> str:
      """Convert ISO 639-3 code to ISO 639-2 code."""
      if iso3 in ISO_639_3:
          return ISO_639_3[iso3].alpha_2
      else:
          return ""
  
label_desc: Use image node_id 1 for calling a global function with example usage: iso_639_2_from_3(iso3) and returns: ISO_639_3, str