26924
Estradiol ( E2 ) and progesterone ( P4 ) plasma levels were measured by radioimmunoassay .
 Chemical: Estradiol; Chemical: progesterone
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: Estradiol, progesterone 
Answer:
 Chemical: Estradiol; Chemical: progesterone