13728
John W. Rowe , the chairman of Exelon , the largest nuclear operator in the United States , says that the high price of natural gas is an incentive to build new plants , but that an offsetting factor is the continuing low cost of coal .
 person of company: John W. Rowe, Exelon
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: ethnicity, place lived, geographic distribution, company industry, country of administrative divisions, administrative division of country, location contains, person of company, profession, ethnicity of people, company shareholder among major shareholders, sports team of location, religion, neighborhood of, company major shareholders, place of death, nationality, children, company founders, company founded place, country of capital, company advisors, sports team location of teams, place of birth 
Text: {0} 
Answer:
 person of company: John W. Rowe, Exelon