I want to know the answer to the following question:
What American University has a big campus in Mexico City?
All the background I'm provided with is that "The second largest higher-education institution is the National Polytechnic Institute (IPN), which includes among many other relevant centers the Centro de Investigación y de Estudios Avanzados (Cinvestav), where varied high-level scientific and technological research is done.". Is that enough to answer the question?
Answer: no