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.

[EX 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 .
[EX 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 ) .

[EX Q]: The Royal Military Academy Sandhurst is the place where the British Army trains their officers .
[EX A]: The Royal Military Academy Sandhurst ( RMAS or RMA Sandhurst ) , commonly known simply as Sandhurst , is one of several military academies of the United Kingdom and is the British Army 's initial officer training centre .

[EX Q]: In taxonomy , the Haloarchaea are a class of the Euryarchaeota , found in water with salt .
[EX A]:
Haloarchaea ( halophilic archaea , halophilic archaebacteria , halobacteria ) are a class of the Euryarchaeota , found in water saturated or nearly saturated with salt .