33950
The first radiation of the diatoms ( generally siliceous shelled , rather than calcareous ) in the oceans occurred during the Cretaceous ; freshwater diatoms did not appear until the Miocene .
 location: Cretaceous; location: Miocene
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: Cretaceous, Miocene 
Answer:
 location: Cretaceous; location: Miocene