Generate a question which can yield the answer mentioned in the input. Generated question must be answered by the answer provided in input, without using any extra knowledge.

Context : Nikola Kalabić (until the start of World War II) worked in Land-registry management in Valjevo. 
Answer : World War II
In what war was Nikola Kalabić a combatant?

Context : Health administration or healthcare administration is the field relating to leadership, management, and administration of public health systems, health care systems, hospitals, and hospital networks. 
Answer : health care
Which industry is Health administration associated with?

Context : The Battle of Navarino was a naval battle fought on 20 October 1827, during the Greek War of Independence (1821--32), in Navarino Bay (modern-day Pylos), on the west coast of the Peloponnese peninsula, in the Ionian Sea. 
Answer : 20 October 1827

When did Battle of Navarino occur?