<https://jasonhunterdesign.com/examples-of-3-excellent-website-opt-in-forms/#schema-webpage>
<http://schema.org/hasPart>
<https://jasonhunterdesign.com/examples-of-3-excellent-website-opt-in-forms/#schema-nav-element-29053>
<https://jasonhunterdesign.com/examples-of-3-excellent-website-opt-in-forms/>