148235
Prior to the emergence of the Tibetan diaspora in the 1950s , Tibetans do not seem to have been familiar with abortion for reasons of medical necessity , and , facing little population pressure , saw little reason to engage in what they saw as the destruction of innocent life .
 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