2900
In April  2007   China Mobile  Guangdong completed reconstructing the existing IN and deployed the first commercial OCS in the world which meets 3GPP specifications and paved the way towards large-scale evolution for existing INs ( this is not an authentic information some other vendors like Ericsson implemented OCS long before 2007 ) .
 founded: 2007, China Mobile
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "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} 
Answer:
 founded: 2007, China Mobile