I want to know the answer to the following question:
Of the ten species removed due to extinction, how many are believe to have already been extinct when listed?
All the background I'm provided with is that "As of September 2012, fifty-six species have been delisted; twenty-eight due to recovery, ten due to extinction (seven of which are believed to have been extinct prior to being listed), ten due to changes in taxonomic classification practices, six due to discovery of new populations, one due to an error in the listing rule, and one due to an amendment to the Endangered Species Act specifically requiring the species delisting.". Is that enough to answer the question?
Answer: yes