Unable to answer "What’s the house number of this building?" – Belisario Dominguez (School Grounds) – https://osm.org/way/1113390430 via StreetComplete 57.3:

Es el patio de la escuela

Attached photo(s):
https://westnordost.de/p/216370.jpg
https://westnordost.de/p/216371.jpg