XML parsing in Go

main.go

package main

import (
  "fmt"
  "encoding/xml"
  "net/http"
  "errors"
)

type Answer struct {
  correct boolean
  answer string
}

type Question struct {
  question string
  ask string
  answerOne Answer
  answerTwo Answer
  answerThree Answer
  answerFour Answer
}

func parseXML(input io.ReadWriter) ([]Question,error) {
  output, err := xml.NewDecoder(Question).Decode(input)
  if err != nil {
    return nil, err
  }
  return output, nil
}

func main() {
  res, err := http.Get("http://www.macs.hw.ac.uk/~pjbk/quiz/history.xml")
  if err != nil {
    log.Fatal("Error during GET request.")
  }
  res, er := parseXML(res)
  if er != nil {
    log.Fatal("Error during XML parsing")
  }
}