Given two noun phrases (arguments) and relationship between them, form a sentence that expresses theses arguments with the given relationship.

[Q]: Relationship: 'stand for', Argument/Subject 1: 'usp', Argument/Subject 2: 'unique sell proposition'
[A]: USP stands for Unique Selling Proposition .


[Q]: Relationship: 'be companion of', Argument/Subject 1: 'luke', Argument/Subject 2: 'paul'
[A]: It is generally agreed that the author of Luke was a companion of Paul .


[Q]: Relationship: 'post', Argument/Subject 1: 'first', Argument/Subject 2: 'october'
[A]:
The first post on this blog was October 21st of 2007 .