I want to know the answer to the following question:
Angara and Patriot are two examples of what type of system?
All the background I'm provided with is that "Armies typically have air defence in depth, from integral MANPADS such as the RBS 70, Stinger and Igla at smaller force levels up to army-level missile defence systems such as Angara and Patriot.". Is that enough to answer the question?