If I add "Sermons" to my passage guide it will return certain sermons relevant to the verse or passage. For example I type in Jeremiah 1:11-19 and it returns one of Spurgeon's sermons. What resource information does Logos identify when returning results? I have sermons from other resources along with PB sermon resources. Is it possible for the user to add tags, subject headings, etc. in order to have those resources included in the Sermons section results?