Complex sentence: However, that is not to say that all chengyu are born of an oft-told fable; indeed, chengyu which are free of metaphorical nuances pervade amidst the otherwise contextually driven aspect of written vernacular Chinese.
Split into simpler sentences: However, that is not to say that all chengyu are born of an oft-told fable. Indeed, chengyu which are free of metaphorical nuances pervade amidst the otherwise contextually driven aspect of written vernacular Chinese.