core__form-input__deprecated-v1.serialized.html

<!-- wp:form-input -->
<div class="wp-block-form-input"><label class="wp-block-form-input__label"><span class="wp-block-form-input__label-content">Label</span><input class="wp-block-form-input__input" type="text" name="label" aria-required="false"/></label></div>
<!-- /wp:form-input -->