The oldest playable musical instruments were discovered in and are thought to be between 7,000 and 9,000 years old.

the answer to fill in the blank in this question would be the word resource, it is defined as the money, material or people (since human resource is a very valuable good) that a company or a person has at disposition (meaning they can use the resource as they see fit), to be able to complete a task or achieve a goal.  

austria

hugary

yugoslavia

czechoslovakia