43823
Airbus , Boeing 's European rival , quickly countered by buying a 30 percent stake in Tenzing , a Seattle maker of in-flight Internet systems , thinking it would enable it to provide onboard e-mail in 500 planes by 2003 .
 company founded place: Boeing, Seattle
Given options, please tell me the relationships of all the listed entity pairs.Output format is "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} 
 Entity Pairs:  Boeing, Seattle 
Answer:
 company founded place: Boeing, Seattle