29309
A series of novel titanocene - complexes has been prepared and evaluated for their growth regulatory effects in MCF7 and SkBr3 breast cancer cells .
 Chemical: titanocene
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: titanocene 
Answer:
 Chemical: titanocene