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]: Protocols including Packet over SONET / SDH , MPLS , ATM and Frame relay are often used by service providers to deliver the links that are used in WANs .
[EX A]: Protocols including Packet over SONET / SDH , Multiprotocol Label Switching ( MPLS ) , Asynchronous Transfer Mode ( ATM ) and Frame Relay are often used by service providers to deliver the links that are used in WANs .

[EX Q]: The Tower of David ( , " Migdal David " , , " Burj Daud " ) is an ancient citadel located in Jaffa Gate of the Old City of Jerusalem .
[EX A]: The Tower of David ( , " Migda ́ l Davi ́ d " , , " Burj Da ̄ wu ̄ d " ) , also known as the Jerusalem Citadel , is an ancient citadel located near the Jaffa Gate entrance to western edge of the Old City of Jerusalem .

[EX Q]: The word " apartheid " means " separateness " in the Afrikaans language .
[EX A]:
" Apartheid " is an Afrikaans word meaning " separateness " , or " the state of being apart " , literally " apart-hood " ( from Afrikaans " -heid " ) .