Input (grade 13): The BBC commissioned Carol Ann Duffy, the Poet Laureate, to write a poem to mark the deaths of Allingham and Harry Patch, who died one week after Allingham on 25 July 2009.
Output (grade 12): The BBC asked Carol Ann Duffy, the Poet laureate, to write a poem to mark the deaths of Allingham and Harry Patch (who died one week after Allingham on 25 July 2009).