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: " Burning " ( calcination ) converts them into the highly caustic material " quicklime " ( calcium oxide ) , and , through the addition of water , into the less caustic , but still strongly alkaline " slaked lime " ( calcium hydroxide ) .

SOLUTION: " Burning " ( calcination ) of these minerals in a lime kiln converts them into the highly caustic material " burnt lime " , " unslaked lime " or " quicklime " ( calcium oxide ) and , through subsequent addition of water , into the less caustic ( but still strongly alkaline ) " slaked lime " or " hydrated lime " ( calcium hydroxide , Ca ( OH ) ) , the process of which is called " slaking of lime " .

PROBLEM: Henrik , a good passer , is known to help set up goals , while Daniel is known to score goals .

SOLUTION:
Henrik , a skilled passer , was known as a playmaker ( 150 + more career NHL assists than Daniel ) while Daniel was known as a goal-scorer ( 150 + more career NHL goals than Henrik ) .