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In the present study , we showed that two Pt - resistant human cancer cell lines exhibited stem - cell like EMT properties , had high cellular GSH and accumulated significantly less cellular Pt compared to their parental cells , and failed to undergo apoptosis when exposed to Pt at the drug concentrations toxic to the parental cells .
 Chemical: Pt; Chemical: GSH; Chemical: Pt; Chemical: Pt
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: Pt; Chemical: GSH; Chemical: Pt; Chemical: Pt