1082
This reaction is done a second time to yeid a dimer of modified tyrosine residues that have been further cyclized via Pictet-Spengler reaction , yielding a bicyclic ring moiety .
 person: Pictet-Spengler
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: Pictet-Spengler