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 Psychological training and increased security that many schools instituted after the killing of 13 people in 1999 at Columbine High School in Colorado have given teachers and principals new tools and insights to spot potential trouble , the experts said . 
 location contains: Colorado, Columbine High School
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: nationality, country capital, place of death, children, location contains, place of birth, place lived, administrative division of country, country of administrative divisions, company, neighborhood of, company founders 
Text: {0} 
Answer:
 location contains: Colorado, Columbine High School