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At the same time , he began writing for the Houston Chronicle , covering such popular subjects as Lyle Lovett , Gloria Estefan and Olivia Newton-John .
 Houston Chronicle, Lyle Lovett, Gloria Estefan, Olivia Newton-John
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Houston Chronicle, Lyle Lovett, Gloria Estefan, Olivia Newton-John