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export interface ILocationOnEarthSurface {    latitude: number    longitude: number}
export interface IDanceEvent {    id: string    title: string    imageName: string    dances: string    countryCode: string    city: string    street: string    housenumber: string    startDate: string    startTime: string    link: string    lat: number    lon: number}
export interface IDancing {    countryCode: string    dancing: string}