9047
Given that energy ( exciton ) migration in natural photosynthesis primarily occurs in highly ordered porphyrin - like pigments ( chlorophylls ) , equally highly ordered porphyrin - based metal - organic frameworks ( MOFs ) might be expected to exhibit similar behavior , thereby facilitating antenna - like light - harvesting and positioning such materials for use in solar energy conversion schemes .
 Chemical: porphyrin; Chemical: chlorophylls; 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: porphyrin, chlorophylls, porphyrin 
Answer:
 Chemical: porphyrin; Chemical: chlorophylls; Chemical: porphyrin