def clean(mapping, bind, values):
categories = {'<STR_LIT:C>': '<STR_LIT:U+0020>'}<EOL>for value in values:<EOL><INDENT>if isinstance(value, six.string_types):<EOL><INDENT>value = normality.normalize(value, lowercase=False, collapse=True,<EOL>decompose=False,<EOL>replace_categories=categories)<EOL><DEDENT>yield value<EOL><DEDENT>
Perform several types of string cleaning for titles etc..