Complex sentence: The island is completely surrounded by its expansive shallow coral base, which caused the Philippine Navy's "BRP Lanao del Norte" (LT-504) to run aground during a failed attempt to dock near the island in 2004.
Split into simpler sentences: The island is completely surrounded by its expansive shallow coral base. This caused the Philippine Navy's "BRP Lanao del Norte (LT-504)", to run aground during a failed attempt to dock near the island in 2004.