In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.

[Q]: A Horn clause with exactly one positive literal is a definite clause ; a definite clause with no negative literals is sometimes called a “ fact ” ; and a Horn clause without a positive literal is sometimes called a goal clause .
[A]: A Horn clause with exactly one positive literal is a definite clause or a strict Horn clause ; a definite clause with no negative literals is sometimes called a unit clause , and a unit clause without variables is sometimes called a fact ; and a Horn clause without a positive literal is sometimes called a goal clause ( note that the empty clause consisting of no literals is a goal clause ) .


[Q]: The United States National Guard is an organization of the United States Army and the United States Air Force .
[A]: The National Guard is a joint activity of the United States Department of Defense ( DoD ) composed of reserve components of the United States Army and the United States Air Force : the Army National Guard and the Air National Guard , respectively .


[Q]: He also established many of the UN 's development and environmental agencies , funds and programmes , including the United Nations Development Programme ( UNDP ) , the UN University , UNCTAD , UNITAR and the United Nations Environment Programme .
[A]:
He also established many of the UN 's development and environmental agencies , funds and programmes , including the UN Development Programme ( UNDP ) , the UN University , the United Nations Conference on Trade and Development , United Nations Institute for Training and Research ( UNITAR ) , and the UN Environmental Programme .


