':example \'integrate extensible convergence\''

def catch_phrase(self):

    catch_phrase = u''
    while True:
        pattern = self.random_element(self.catch_phrase_formats)
        catch_phrase = self.generator.parse(pattern)
        catch_phrase = (catch_phrase[0].upper() + catch_phrase[1:])
        if self._is_catch_phrase_valid(catch_phrase):
            break
    return catch_phrase
