Task: Question Generation
Input (English): Greece has universal compulsory military service for males, while females are exempted from conscription but may otherwise serve in the military. As of 2009[update], mandatory military service is nine months for male citizens between the ages of 19 and 45. Additionally, Greek males between the age of 18 and 60 who live in strategically sensitive areas may be required to serve part-time in the National Guard. However, as the military has sought to become a completely professional force, the government has promised to reduce mandatory military service or abolish it completely.
Output (English): At what age might men required to serve in the National Guard?