101491
Other hyperthermals likely followed ETM-2 at nominally 53.6 Ma ( H-2 ) , 53.3 ( I-1 ) , 53.2 ( I-2 ) and 52.8 Ma ( informally called K , X or ETM-3 ) .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities:  
Answer:
 None