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: Bradford is a major city in West Yorkshire , England .

SOLUTION: The City of Bradford is a local government district of West Yorkshire , England , with the status of a city and metropolitan borough .

PROBLEM: The institution does testing and certification of products ( by providing " standards " ) and ensuring the quality of products .

SOLUTION: The Standards Institution of Israel ( SII ) is a state-owned corporation responsible for setting standards for products and services provided in Israel , testing and certification of products ( by providing standards " stamp of approval " ) and verifying that the certified products maintain their quality over time .

PROBLEM: A tornado emergency is a stronger wording of tornado warnings used by the National Weather Service in the United States .

SOLUTION:
A tornado emergency is an enhanced version of a tornado warning , which is used by the National Weather Service ( NWS ) in the United States during imminent , significant tornado occurrences in highly populated areas .