6753
5 - ( Hydroxymethyl ) - 2 - furaldehyde and 2 - furaldehyde were determined by high performance liquid chromatography with diode array detection .
 Chemical: 5 - ( Hydroxymethyl ) - 2 - furaldehyde; Chemical: 2 - furaldehyde
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: 5 - ( Hydroxymethyl ) - 2 - furaldehyde, 2 - furaldehyde 
Answer:
 Chemical: 5 - ( Hydroxymethyl ) - 2 - furaldehyde; Chemical: 2 - furaldehyde