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In the present work , the lethality percentiles including median lethal doses ( LD50 ) , accumulation , distribution and toxicokinetics of aluminum in the liver , kidney , intestine , brain and serum of male albino rats , following a single oral administration were studied throughout 1 , 3 , 7 , 14 and 28 days .
 Chemical: aluminum
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: aluminum 
Answer:
 Chemical: aluminum