3614
The contact inhibition of cell proliferation is a process restricting the cell division of confluent non - transformed cells , which is frequently abolished in cancer cells ; however , the mechanisms contributing to its disruption are still only partially understood .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None