110408
By transplanting Xenopus kidney cell nuclei into oocytes of a different amphibian species , they demonstrated that nuclear reprogramming of protein-coding genes was caused by oocyte cytoplasm .
 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