Nothing
#' Some animals and their attributes
#'
#' @format A data frame with 6 rows and 4 variables:
#' \describe{
#' \item{animal}{the name of the animal}
#' \item{type}{the type of animal}
#' \item{flies}{whether the animal can fly}
#' \item{mass}{the average mass of the animal in grams}
#' }
"animals"
#' Some animals and their attributes, in rich text
#'
#' @format A data frame with 6 rows and 4 variables:
#' \describe{
#' \item{animal}{the name of the animal}, in rich text
#' \item{type}{the type of animal}
#' \item{flies}{whether the animal can fly}
#' \item{mass}{the average mass of the animal in grams}
#' }
"animals_rich"
#' The compositions of some espresso-based beverages
#'
#' @format A data frame with 6 rows and 3 variables:
#' \describe{
#' \item{beverage}{the name of the beverage}
#' \item{ingredient}{the ingredient}
#' \item{proportion}{the proportion of a cup to fill with the ingredient}
#' }
"beverages"
#' The compositions of some espresso-based beverages, in rich text
#'
#' @format A data frame with 6 rows and 3 variables:
#' \describe{
#' \item{beverage}{the name of the beverage}
#' \item{ingredient}{the ingredient, in rich text}
#' \item{proportion}{the proportion of a cup to fill with the ingredient}
#' }
"beverages_rich"
#' Some craft and their altitudes
#'
#' @format A data frame with 4 rows and 2 variables:
#' \describe{
#' \item{craft}{the name of the craft}
#' \item{altitude}{the craft's normal cruising altitude in metres}
#' }
"altitudes"
#' Robert Frost's poem *Nothing Gold Can Stay* (1923)
#'
#' @format A data frame with 8 rows and 5 variables:
#' \describe{
#' \item{line}{a line from the poem}
#' \item{xmin}{the xmin coordinate with which to draw the line}
#' \item{xmax}{the xmax coordinate with which to draw the line}
#' \item{ymin}{the ymin coordinate with which to draw the line}
#' \item{ymax}{the ymax coordinate with which to draw the line}
#' \item{linenumber}{the line number}
#' }
"gold"
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