8102
The chemical resemblance between porphyrins and expanded and isomeric porphyrins , as well as the increasing accessibility of the requisite starting materials is giving birth to the hybrid field of pi - extended expanded and isomeric porphyrins .
 Chemical: porphyrins; Chemical: porphyrins; Chemical: porphyrins
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: porphyrins; Chemical: porphyrins; Chemical: porphyrins