Disable another question when choosing Dont Know

1. What is the problem? Be very detailed.

For this question, we have date widget and the option to choose "Don't Know". I am planning to make the don't know option as select one or select multiple.

How will I be able to disable the other question when the other is already answered?

Badly needed your help, thank you!

2. What app or server are you using and on what device and operating system? Include version numbers.

ODK Collect v1.28.4

3. What you have you tried to fix the problem?

4. What steps can we take to reproduce the problem?

5. Anything else we should know or have? If you have a test form or screenshots or logs, attach below.

You can add a relevant column in XLSForm to do this. There are docs on that here.