one of his fifty poems
... that Amir Hamzah left one of his fifty poems in his prison cell before being executed?
... that <a href="./Amir_Hamzah" id="mwAjk" rel="mw:WikiLink" title="Amir Hamzah">Amir Hamzah</a> left <b id="mwAjo"><a class="mw-redirect" href="./List_of_works_by_Amir_Hamzah" id="mwAjs" rel="mw:WikiLink" title="List of works by Amir Hamzah">one of his fifty poems</a></b> in his prison cell before being executed?