15784
Equitest , visual , vestibular , and somatosensory systems were provoked with increasing difficulty ( 6 tests , SO1 - SO6 ) and body sway was measured with a dual forceplate .
 None
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:  
Answer:
 None