Given two noun phrases (arguments) and relationship between them, form a sentence that expresses theses arguments with the given relationship.
Example: Relationship: 'knock', Argument/Subject 1: 'someone', Argument/Subject 2: 'it'
Example solution: The mailbox was bent and broken and looked like someone had knocked it over on purpose.
Example explanation: The generated sentence contains the two given subjects - someone and it, and they are related to each other on the basis of the given relationship - knocked

Problem: Relationship: 'be chairman of', Argument/Subject 1: 'greenspan', Argument/Subject 2: 'federal reserve'

Solution: Alan Greenspan , Chairman of the Board of Governors of the Federal Reserve System , gave the conference keynote address .