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Pleurotus florida , an edible species of oyster mushrooms , was grown on wheat straw from the seleniferous belt of Punjab ( India ) and its potential to mobilize and accumulate selenium from the growth substrate was studied .
 Chemical: selenium
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: selenium