3410
The study conducted by researchers at the  University of Waterloo  in  Canada  showed that in addition to words like light mild and low-tar which have been banished from cigarette packets in more than 40 countries design elements and color are being used by tobacco companies to lull smokers into a false sense of security about the harmful effects of smoking .
 country of headquarters: University of Waterloo, Canada
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:
 country of headquarters: University of Waterloo, Canada