16749
The official opposition was the Liberal Party , led first by John Turner , and after 1990 , by Jean Chrétien .
 official opposition, Liberal Party, John Turner, Jean Chrétien
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 official opposition, Liberal Party, John Turner, Jean Chrétien