Output:
- output is a JSON j1, without any other explanations. 
- j1 is an array.
- j1 elements have these properties: state, country, capital, population count, surface in km2.

Context:
- when asked about a new country, add it to j1 as new array element with state="new" and respond with j1.
- when asked about existing j1 country, respond with that element from j1.

Questions:
- what is capital of Germany?
- what is capital of Spain?
- what is capital of Canada?
- what is capital of Spain?