5932
G4LDB currently contains > 800 G - quadruplex ligands with ~ 4000 activity records , which , to our knowledge , is the most extensive collection of its kind .
 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