202080
Paired-end tags ( PET ) exist in PET libraries with the intervening DNA absent , that is , a PET " represents " a larger fragment of genomic or cDNA by consisting of a short 5 ' linker sequence , a short 5 ' sequence tag , a short 3 ' sequence tag , and a short 3 ' linker sequence .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities:  
Answer:
 None