Missing Filed "License", and Missing Field "Creator"

Hi.  I am getting two warnings on most of my pages when check my URLs in Google Console:

Missing field "license" (optional)

Missing field "creator" (optional)

How can I fix these issues?

I use this meta markup

<script type="application/ld+json">

{

"@context": "http://schema.org",

"@type": "Dataset",

"name": "--------",

"description": "-----------"

}

</script>

I would really appreciate the help.  thanks.