Complex sentence: In 2003, a blue plaque was unveiled on the public conveniences where she worked and in 2006 she became the first of her profession to be given an entry in the "Oxford Dictionary of National Biography".
Split into simpler sentences: In 2003, a blue plaque was unveiled on the public conveniences where she worked. In 2006, Hughes became the first of her profession to be given an entry in the "Oxford Dictionary of National Biography".