76792
At 537 " °C , this transforms quickly and reversibly into the similar β-quartz , with a change of the Si–O–Si angle to 155 ° but a retention of handedness .
 location: Si–O–Si
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Si–O–Si 
Answer:
 location: Si–O–Si