24924
Amphibian frog " Xenopus laevis " serves as an ideal model system for the study of the mechanisms of apoptosis .
 location: Xenopus
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: Xenopus 
Answer:
 location: Xenopus