Answer:
the Last Fighting Tommy
Henry John Patch (17 June 1898 – 25 July 2009), dubbed in his later years "the Last Fighting Tommy", was an English supercentenarian, briefly the oldest man in Europe, and the last surviving combat soldier of the First World War from any country to have fought in the trenches.
I searched a bit online and my answer is mannequins.
So for this essay you know that it is definitely not the conclusion. It is not the topic sentence but it is supporting evidence of the topic sentence. It can also be seen as a hook because it is at the beginning of the essay and it catches the reader's attention.
You can say that it is either supporting evidence or a hook. It all depends on what your teacher is looking for. If I was you I would go with supporting evidence.
hope it helps :)