Defining template can't access outer context

gistfile1.txt

package main

import "text/template"
import "os"

type address struct {
	House    string
	Street   string
	PostCode string
	Country  string
}

type person struct {
	FirstName    string
	FamilyName   string
	Address      address
	PhoneNumbers []string
}

func main() {
	source :=
		`{{ "Who's this guy and where does he live" }}
{{define "phony"}}
{{.}} and his family name is {{$.FamilyName}}
{{- end -}}
{{.FirstName}} {{.FamilyName}}
{{with .Address -}}
  The {{ .Country }} is where {{$.FirstName}} lives.  {{/* . refers to Address instance */}}
{{end}}
His phone numbers are:
{{- range .PhoneNumbers -}}
{{template "phony" .}}
{{- end}}
`

	p := person{FirstName: "Markus", FamilyName: "Ryan", Address: address{Country: "UK"}, PhoneNumbers: []string{"123", "456", "789"}}
	tmpl := template.Must(template.New("table").Parse(source))
	err := tmpl.Execute(os.Stdout, p)
	if err != nil {
		panic(err)
	}
}