25504
Lignans extracted from Vitex negundo possess cytotoxic activity by G2 / M phase cell cycle arrest and apoptosis induction .
 Chemical: Lignans
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: Lignans 
Answer:
 Chemical: Lignans