Article: The second largest higher-education institution is the National Polytechnic Institute (IPN), which includes among many other relevant centers the Centro de Investigacion y de Estudios Avanzados (Cinvestav), where varied high-level scientific and technological research is done. Other major higher-education institutions in the city include the Metropolitan Autonomous University (UAM), the National School of Anthropology and History (ENAH), the Instituto Tecnologico Autonomo de Mexico (ITAM), the Monterrey Institute of Technology and Higher Education (3 campuses), the Universidad Panamericana (UP), the Universidad La Salle, the Universidad del Valle de Mexico (UVM), the Universidad Anahuac, Simon Bolivar University (USB), the Alliant International University, the Universidad Iberoamericana, El Colegio de Mexico (Colmex), Escuela Libre de Derecho and the Centro de Investigacion y Docencia Economica, (CIDE). In addition, the prestigious University of California maintains a campus known as "Casa de California" in the city. The Universidad Tecnologica de Mexico is also in Mexico City.

Question: What is the second biggest education center in Mexico City?
National Polytechnic Institute