Go to: https://www.wikidata.org/wiki/Q100828354
For P4020 (ISQ dimension) try to enter the value \mathsf{T}.
It fails with the following message:
Could not save due to an error. Bad value type unknown, expected string
Go to: https://www.wikidata.org/wiki/Q100828354
For P4020 (ISQ dimension) try to enter the value \mathsf{T}.
It fails with the following message:
Could not save due to an error. Bad value type unknown, expected string