Unable to answer "What’s the surface here?" for way/1188895320 via StreetComplete 53.3:

These steps aren't underground

Unable to answer "What kind of building is this?" for way/564953772 via StreetComplete 53.3:

Already left note, but StreetComplete still has this pin here. It's an exterior spiral staircase

Unable to answer "What kind of building is this?" for way/363049281 via StreetComplete 53.2:

This one's the same!

Unable to answer "What kind of building is this?" for way/363049281 via StreetComplete 53.2:

Since it's stated in the OSM wiki this: "(note that objects lasting for just a few days should not be mapped in OSM)"
neither this nor "Bancada C", which are temporary grandstands should not be displayed

This should be set as "temporary" as well.

This should be set as "temporary" as well.

This should be set as "temporary" as well.

Statue "Reunião com Poetas"

via StreetComplete 50.2

Unable to answer "What kind of building is this?" for way/363049272 via StreetComplete 53.2:

Temporary grandstands.