27503
Melatonin decreased estradiol ( E2 ) and increased progesterone ( P4 ) and 6 - sulfatoxymelatonin ( 6 - STM ) , while an ethanol - melatonin combination reduced both P4 and E2 .
 Chemical: Melatonin; Chemical: estradiol; Chemical: progesterone; Chemical: 6 - sulfatoxymelatonin; Chemical: 6 - STM; Chemical: ethanol; Chemical: melatonin
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: Melatonin, estradiol, progesterone, 6 - sulfatoxymelatonin, 6 - STM, ethanol, melatonin 
Answer:
 Chemical: Melatonin; Chemical: estradiol; Chemical: progesterone; Chemical: 6 - sulfatoxymelatonin; Chemical: 6 - STM; Chemical: ethanol; Chemical: melatonin