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#' Marathons in Warsaw / Poland
#'
#' Data from Warsaw marathons 2013 - 2016.
#'
#' Orlen Maraton Warszawski - Based on https://www.orlenmarathon.pl/ database.
#'
#' Polmaraton Warszawski - Based on http://pzupolmaratonwarszawski.com/ database.
#'
#' The subsequent columns describe:
#' \itemize{
#' \item nazwisko_imie First and Last name
#' \item nr.startowy Number
#' \item plec Gender
#' \item rok Year
#' \item biegi_uliczne Name of the marathon
#' \item czas_brutto Gross Time
#' \item czas_brutto_sec Gross Time in secs
#' \item czas_netto Net Time
#' \item czas_netto_sec Net Time in sec
#' \item grup_wiek Age group
#' \item kategoria Category
#' \item kraj_nazwa Country
#' \item miejsce_kat Place in Category
#' \item miejsce_open Place in Open
#' }
#'
#' Prepared by Krzysztof Trajkowski.
#'
#' @docType data
#' @keywords datasets
#' @name maratony
#' @examples
#' library("Przewodnik")
#' summary(maratony)
#' @usage data(maratony)
#' @format a data.frame with 70736 rows and 14 columns
#'
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