Searched ESV (Basic Search) for {Section <GramCon 3C>} which yielded 373 results in 137 articles. Same search with Bible search yields 409 results in 328 verses.
Ran Basic search with NKJV and received 507 results in 213 articles. However, Bible search yields 541 results in 328 verses.
From these results, it would seem that this dataset does not produce reliable results. Unless FL has a reasonable explanation for such variations, it is time to revisit the tagging of these resources.