What is a question about this article? If the question is unanswerable, say "unanswerable".

The New York City Public Schools system, managed by the New York City Department of Education, is the largest public school system in the United States, serving about 1.1 million students in more than 1,700 separate primary and secondary schools. The city's public school system includes nine specialized high schools to serve academically and artistically gifted students.

How many highschools are specialized in NYC?
nine