In reply to "What is the name of this road?":
trenbidearen gurutzatzeko zubia

https://www.openstreetmap.org/way/43054655

In reply to "How many levels does this building have?":
ez da etxe bat, tren geltokia da

https://www.openstreetmap.org/way/489794666

In reply to "What is the house number of this building?":
Building has several numbers depending on street

https://www.openstreetmap.org/way/347967610

eskilarak / escaleras

via StreetComplete 6.1

bidea / camino

via StreetComplete 5.2

eskilarak / escaleras

via StreetComplete 6.1

eskilarak / escaleras

via StreetComplete 5.2

Unable to answer "What are the collection times of this postbox?" for https://www.openstreetmap.org/node/560565248 via StreetComplete 5.2:

ez dago postontzirik / no hay buzón

kalea behin betiko moztuta / calle cortada permanentemente

via StreetComplete 5.2

POI sightseeing

via StreetComplete 8.2