With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: After the end of the Cold War and the advent of the Democratic Revolution, the air force was effectively grounded despite ample supplies of fuel and well-maintained aircraft, because the college graduates who would be qualified to fly the fast jets were so much more likely to leave the country. However, the government has been trying to revive the air force since 2001. The country has the goal of developing a full air force in the future.
text_B: Aside from logistical difficulties, would you say that the real problem facing this nation's air force is the lack of educational opportunities for citizens?
NO.