Wanted to know if it is possible to change the background color of the second paragraph in the same p element

<span class="trim-last-paragraph">
<p><strong>Lorem Ipsum</strong>is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.<br><br><strong>Lorem Ipsum</strong>is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.</p>
</span>
I know it is possible with different p tags using the nth-child
Thank you for your help! :)