{{- $file := .Get 0 }}
{{- $path := printf "content_images/%s" $file}}
{{- $img := resources.Get $path }}
{{- $caption := .Get 1 }}
{{- $source := .Get 2 }}
<figure class="graph">
  <img 
    class="center"
    alt="{{ $caption }}" 
    src="{{ $img.Permalink }}" 
    >
  <figcaption>
    {{ $caption }}

    {{- if $source }}
    <a href="{{ $source }}" target="_blank" title="source">[source]</a>
    {{ end }}
  </figcaption>
</figure>