10390
The earliest species of " Smilodon " is " S. " gracilis " , which existed from 2.5 million to 500,000 years ago ( early Blancan to Irvingtonian ages ) and was the successor in North America of " Megantereon " , from which it probably evolved .
 location: Blancan; location: Irvingtonian; location: North America; person: Megantereon
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: Blancan; location: Irvingtonian; location: North America; person: Megantereon