8 – Get paragraph field in a specific text format


I have a landing page with a list of paragraphs. I’m trying to render the main body paragraph field as a summary to use in a metatag in the header.

$basic_content_block->get('field_content')->first()->getValue();

Returns:

(
    'value' => "<p><span><span><span><span><span><span>Some rich text here.</span></span></span></span></span></span><span",
    'format' => "basic_html"
)

How can I return this field as a teaser view, or more appropriately, a summary of just the text?