TASK DEFINITION: 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.
PROBLEM: An artesian aquifer is trapped between rocks or clay which causes the pressure .

SOLUTION: An artesian aquifer is trapped water , surrounded by layers of impermeable rock or clay which apply positive pressure to the water contained within the aquifer .

PROBLEM: Comparison , in grammar , is a property of adjectives and adverbs .

SOLUTION: Comparison is a feature in the morphology or syntax of some languages , whereby adjectives and adverbs are inflected or modified to indicate the relative degree of the property defined by the adjective or adverb .

PROBLEM: Luxembourgish is a West Germanic language .

SOLUTION:
Luxembourgish , Luxemburgish , Letzeburgesch ( or ) ( Luxembourgish : " Le ̈ tzebuergesch " ) , or Luxembourgian is a West Germanic language that is spoken mainly in Luxembourg .