Based on the clue '2 of 4 countries bordering greece', what is the answer?

Based on the clue '2 of 3 presidents who took their oaths of office i...', what is the answer? Based on the clue '2 of 3 signs of the zodiac whose symbols have horn...', what is the answer? Based on the clue '2 of 3 who attended a military academy', what is the answer? What is referred to by '2 of 4 baptists'? Based on the clue '2 of 4 performing duos inducted into the rock and ...', what is the answer? What is referred to by '2 of 4 whigs'? Based on the clue '2 of 6 who married a widow', what is the answer? Based on the clue '2 of americas 3 manned space projects designed to ...', what is the answer?