10424
All of the compounds tested , except for compounds 4 , 7 , 16 , 24 , 27 and 28 were selected by the NCI screening system .
 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