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.
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Question: An artesian aquifer is trapped between rocks or clay which causes the pressure .

Answer: 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 .

Question: The U-Bahn and S-Bahn public transit networks , rebuilt after the war , spanned all occupation sectors .

Answer: Berlin 's underground ( Untergrundbahn , U-Bahn ) and Berlin 's S-Bahn ( a metropolitan public transit network ) , rebuilt after the war , continued to span all occupation sectors .

Question: Cutty Sark for Maritime Greenwich is a light metro station on the Docklands Light Railway ( DLR ) Bank-Lewisham Line in Greenwich , south-east London .

Answer:
Cutty Sark for Maritime Greenwich is a light metro station on the Docklands Light Railway ( DLR ) Bank-Lewisham Line in Greenwich , south-east London , so named for its proximity to the Cutty Sark in the Maritime Greenwich district .