code: def extract_col_name(string):
      
      prefixes = ["presence_pass_", "value_pass_", "type_pass_"]
      end = string.rfind("_")
      for prefix in prefixes:
          if string.startswith(prefix):
              return prefix[:-6], string[len(prefix):end]
      return string, string
docs: Take a string and split it.
      String will be a format like "presence_pass_azimuth",
      where "azimuth" is the MagIC column name and "presence_pass"
      is the validation.
      Return "presence", "azimuth".