OSM tag name=St Erth matches Church of Saint Erth in these Wikidata fields:
14th-century church buildings in England | amenity=place_of_worship, disused:amenity=place_of_worship, man_made=tower, building=church |
Church of England church buildings in Cornwall | man_made=tower, amenity=place_of_worship, building=church, denomination=anglican, disused:amenity=place_of_worship |
Grade I listed churches in Cornwall | amenity=place_of_worship, disused:amenity=place_of_worship, man_made=tower, building=church |