Hard currency may undergo a purchase.Logical formLearned from11 sentences. A purchase may be blocked.Logical formLearned from11 sentences. A (cent stake) may undergo a purchase.Logical formLearned from11 sentences. A comment can be on a purchase.Logical formLearned from11 sentences. A purchase can be subject to conditions.Logical formLearned from11 sentences. Tanks may undergo purchases.Logical formLearned from11 sentences. A ban can be on purchases.Logical formLearned from11 sentences. Military helicopters may undergo a purchase.Logical formLearned from11 sentences. A purchase may pertain-to a central bank.Logical formLearned from11 sentences. Shipping can be on purchases.Logical formLearned from11 sentences. Anti-retroviral drugs may undergo a purchase.Logical formLearned from11 sentences. (Gold reserve) may undergo a purchase.Logical formLearned from11 sentences. A country may mull a purchase of (gold reserve).Logical formLearned from11 sentences. A (football club) may undergo a purchase.Logical formLearned from11 sentences. A (dollar purchase) may pertain-to a country.Logical formLearned from11 sentences.