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For each system , the experimental spectrum closely resembles the calculated spectrum of the lowest energy structure calculated using DFT : for Pt , a classic C2v carbene structure ; for Ta and W , carbene structures that are distorted by agostic interactions ; and a carbyne structure for the Ir complex .
 Chemical: Pt; Chemical: carbene; Chemical: Ta; Chemical: W; Chemical: carbene; Chemical: carbyne; Chemical: Ir
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: Pt, carbene, Ta, W, carbene, carbyne, Ir 
Answer:
 Chemical: Pt; Chemical: carbene; Chemical: Ta; Chemical: W; Chemical: carbene; Chemical: carbyne; Chemical: Ir