Hello, thank you for your cooperation and for the correction in the colors. I will try to reflect the information in English, although it is about Bulgaria and I thought that the site was multilingual. But this is not a problem.
In Sofia, fire hydrants do not have official inventory numbers. That is why I have added their exact location as a name. Namely, in this case, Blvd. Vaptsarov in front of number 8. As for the neighboring hydrant, it is in front of block 36.
If you tell me how to reflect them in another way, despite the lack of inventory numbers, I will be happy to learn and use it.