7136
The company then merged with the English Public Electricity Supplier Southern Electric plc to become  Scottish and Southern Energy  plc on the 14 December  1998  .
 founded: Scottish and Southern Energy, 1998
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: cities of residence, top members employees, members, alternate names, origin, state or provinces of residence, title of person, spouse, city of headquarters, NA, founded by, state or province of headquarters, employee of, countries of residence, country of birth, founded, subsidiaries, country of headquarters 
Text: {0} 
 Entity Pairs:  Scottish and Southern Energy, 1998 
Answer:
 founded: Scottish and Southern Energy, 1998