5015
The hybrid cells , however , exhibited normal morphology , anchorage requirement for proliferation , and largely extended latency periods of tumorigenicity in newborn rats .
 Anatomy: hybrid cells
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
 Entities: hybrid cells 
Answer:
 Anatomy: hybrid cells