173770
A lock screen is a user interface element used by various operating system s. They regulate immediate access to a device by requiring that the user perform a certain action in order to receive access : such as entering a password , using a certain button combination , or by performing a certain gesture using a device 's touchscreen .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 None