<p>what is the error, if an error exists, and why? thanks! </p>
<p>The historian argued that (we ought) to learn (more about) the process by which individuals like Sam Houston (were identified by) others (as leaders). </p>
<p>Thanks!</p>
<p>See nothing wrong with it.</p>
<p>It’s an ugly sentence, but I believe the answer is no error</p>