1538
Of the regioisomeric phpy ' s , 2 - phpy behaves drastically different compared to 3 - and 4 - phpy .
 Chemical: phpy; Chemical: 2 - phpy; Chemical: 3 - and 4 - phpy
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: phpy; Chemical: 2 - phpy; Chemical: 3 - and 4 - phpy