Question: In which internationally recognised block do both Budapest, the most populous city of Hungary and  Mirosław Hermaszewski, a retired Air Force officer and cosmonaut belong?
Sentence (from "Budapest"): With an estimated 2016 population of 1,759,407 distributed over a land area of about 525 km2 , Budapest is also one of the most densely populated major cities in the EU.
Relevant evidence: Yes