Bustami

library(geonames)

# list of city names (in Afghanistan)
cities <- c("Gereshk", "Lashkar Gah", "Marjah", "Nad-e Ali")
                                                                                                                                                                          -5L), class = "data.frame")
# conveninence function to look up and format results
GNsearchAF <- function(x) {
  res <- GNsearch(name=x, country="AF")
  return(res[1, ])
}

Bustami

\documentclass{article}

\begin{document}

<<names>>=
input$firstname
input$lastname
@

\end{document}