#' A preprocess Function
#'
#' This function allows you to remove special characters and number.
#' @param x Any string.
#' @keywords removeNumbers
#' @export
#' @examples
#' removeNumbers()
removeNumbers = function(x) {
ret1 = gsub("http:[a-zA-Z\\/\\.0-9]+|[a-zA-Z]+|[ 0-901-23456789]","",x)
ret1
}
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