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The airline 's chief executive , Chew Choon Seng , said that his planes would hold '' no more than 480 '' passengers in three classes , and that Singapore would use the A380 's '' to expand operations to heavily traveled cities that have slot constraints , '' meaning gates are difficult to get .
 nationality: Chew Choon Seng, Singapore
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:
 nationality: Chew Choon Seng, Singapore