It would be something like "select * from [reality]", except there are various problems like physically manifest reality is not the entirety of it, and our records of reality are often technically from the fantasy realm and the truth has been lost to time without our knowledge.

In the case of allsides.com, they're only comparing ~mainstream US media outlets against each other, but there are many cultures that would consider even left leaning US culture to be insanely far right.

In a more serious world, competent philosophers/linguists/historians/anthropologists/etc would deconstruct and expose these organizations for what they really are: propaganda outlets.