500
Creation In 1920 , after years of land speculation in the San Diego / Julian area of California , Rex Brainerd Clark ( May , 1876 – Aug 31 , 1955 ) , through his North Corona Land Company , purchased of land just north of Corona .
 location: San Diego; person: Clark; location: Corona; location: Corona
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 location: San Diego; person: Clark; location: Corona; location: Corona