19805
To enhance localization of Photofrin to tumors , we have formulated Photofrin with the tumor - localizing graft copolymer poly ( ethylene glycol ) - grafted poly ( l - lysine ) , PLL - g - PEG .
 Chemical: Photofrin; Chemical: Photofrin; Chemical: poly ( ethylene glycol ) - grafted poly ( l - lysine ); Chemical: PLL - g - PEG
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: Photofrin; Chemical: Photofrin; Chemical: poly ( ethylene glycol ) - grafted poly ( l - lysine ); Chemical: PLL - g - PEG