13194
Normally , discrete metal complexes such as [ Au ( CN ) ( 2 ) ] - , when molecularly dispersed in water , cannot interact with one another .
 Chemical: [ Au ( CN ) ( 2 ) ] -
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: [ Au ( CN ) ( 2 ) ] - 
Answer:
 Chemical: [ Au ( CN ) ( 2 ) ] -