9051
The remarkably efficient exciton migration in DA - MOF is attributed to enhanced pi - conjugation through the addition of two acetylene moieties in the porphyrin molecule , which leads to greater Q - band absorption intensity and much faster exciton - hopping ( energy transfer between adjacent porphyrin struts ) .
 Chemical: acetylene; Chemical: porphyrin; Chemical: porphyrin
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: acetylene, porphyrin, porphyrin 
Answer:
 Chemical: acetylene; Chemical: porphyrin; Chemical: porphyrin