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Whether pentoxifylline inhibits dipyridamole - induced coronary hyperemia like other methylxanthines such as theophylline and should be stopped prior to dipyridamole - thallium - 201 imaging is unknown .
 Chemical: pentoxifylline; Chemical: dipyridamole; Disease: hyperemia; Chemical: methylxanthines; Chemical: theophylline; Chemical: dipyridamole; Chemical: thallium
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
 Entities: pentoxifylline, dipyridamole, hyperemia, methylxanthines, theophylline, dipyridamole, thallium 
Answer:
 Chemical: pentoxifylline; Chemical: dipyridamole; Disease: hyperemia; Chemical: methylxanthines; Chemical: theophylline; Chemical: dipyridamole; Chemical: thallium