tblCountries -- CountryID, Country
tblAthletes -- AthletesID, FirstName, Surname, CountryID, M/F
tblSports -- SportID, Sport
tblEvents -- EventID, Event, VenueID, SportID
tblVenues -- VenueID, Venue, Location
tblMedals -- MedalID, MedalType
tblResults -- ResultID, AthleteID, MedalID, EventID...