From the given sentence, extract the phrase (often noun or verb) that carries the given relationship. The generated phrase should be present in the sentence.

[Q]: Given Relationship: 'post in', Sentence: 'Not to mention that I wrote the first post in February 2005 .'
[A]: post


[Q]: Given Relationship: 'be chairman of', Sentence: 'Alan Greenspan , Chairman of the Board of Governors of the Federal Reserve System , gave the conference keynote address .'
[A]: Chairman


[Q]: Given Relationship: 'be enemy of', Sentence: 'Washington should take care not to let the perfect be the enemy of the good in this case , and should support any movement toward a credible regional human rights framework , however incremental .'
[A]:
enemy