2597
Twenty of 41 ( 48 % ) patients received GEM - P as second - line treatment and 11 / 41 ( 27 % ) as third - line therapy .
 Chemical: GEM
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: GEM