16174
Compared with DNA hairpins that have decreased unfolding forces in crowded ( 9 pN ) versus diluted ( 15 pN ) buffers , those of G - quadruplexes remain the same ( 20 pN ) .
 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