#' @export
find_word <- function(res, word) {
    talks <- res$talks
    mutate(talks, occurences = sapply(str_match_all(talks$content, regex(word, ignore_case = TRUE)),
           nrow))
}

#' @export
join_redner <- function(tb, res, fraktion_only = F) {
    joined <- left_join(tb, res$redner, by=c("redner" = "id"))
    if (fraktion_only) select(joined, "fraktion")
    else joined
}