1038
Changes in anion concentration can be monitored rapidly , accurately and with high spatial resolution using optical emission spectroscopy and microscopy , facilitating the measurement of anions such as bicarbonate , lactate , citrate and urate in a variety of bio - fluids .
 Chemical: bicarbonate; Chemical: lactate; Chemical: citrate; Chemical: urate
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: bicarbonate, lactate, citrate, urate 
Answer:
 Chemical: bicarbonate; Chemical: lactate; Chemical: citrate; Chemical: urate