Match: Q1415028 + way/452935107

Wikidata: Agios Kosmas Olympic Sailing Centre (Q1415028)
OSM: Μαρίνα Αγίου Κοσμά (way 452935107)
matcher place: Greece (relation 192307), Regional Unit of South Athens (relation 2612469)
Wikidata and OSM exact location match
English Wikipedia categories: 2004 Summer Olympics stubs, Elliniko-Argyroupoli, Greek sports venue stubs, Marinas in Greece, Olympic sailing venues, Sailing in Greece, Saronic Gulf, Sports venues in Athens, Summer Olympic venue stubs, Venues of the 2004 Summer Olympics
Tags from Wikidata and Wikipedia: amenity=community_centre, amenity=events_venue, landuse=recreation_ground, leisure=marina, leisure=sports_centre, leisure=stadium, sport, sport=multi

Wikidata location: 37.8778, 23.7278 view on OSM

OSM tag name:en=Marina Agios Kosmas matches Agios Kosmas Marina in these Wikidata fields:

Marinas in Greece	leisure=marina
Sports venues in Athens	leisure=stadium, leisure=sports_centre, sport, landuse=recreation_ground, amenity=community_centre