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go - Golang template - how to render templates?

One layout template with three children templates.

layout.html

<html>
  <body>
    {{template "tags"}}

    {{template "content"}}

    {{template "comment"}}
  </body>
</html>

tags.html

{{define "tags"}}
<div>
    {{.Name}}
<div>
{{end}}

content.html

{{define "content"}}
<div>
   <p>{{.Title}}</p>
   <p>{{.Content}}</p>
</div>
{{end}}

comment.html

{{define "tags"}}
<div>
    {{.Note}}
</div>
{{end}}

gocode

type Tags struct {
   Id int
   Name string
}

type Content struct {
   Id int
   Title string
   Content string
}

type Comment struct {
   Id int
   Note string
}


func main() {
    tags := &Tags{"Id":1, "Name":"golang"}
    Content := &Content{"Id":9, "Title":"Hello", "Content":"World!"}
    Comment := &Comment{"Id":2, "Note":"Good Day!"}
}

I am confused that how to render each children template and combine the result to layout output.

Thanks.

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