Read this and answer the question. If the question is unanswerable, say "unanswerable".

Southampton Solent University has 17,000 students and its strengths are in the training, design, consultancy, research and other services undertaken for business and industry. It is also host to the Warsash Maritime Academy, which provides training and certification for the international shipping and off-shore oil industries.

How many students attend Southampton Solent University?
17,000