Complex sentence: Following this powerful conversion, Enos went forth prophesying to the Nephites, and testifies that the Nephites tried to "restore the Lamanites to the true faith in God" (Enos 1:20), but that they were unsuccessful.
Split into simpler sentences: Following this powerful conversion, Enos went forth prophesying to the Nephites. He testifies that the Nephites tried to "restore the Lamanites to the true faith in God" (Enos 1:20), but that they were unsuccessful.