Complex sentence: USS "Dallas" (SSN-700), a "Los Angeles"-class submarine, is one of two ships of the United States Navy to be named for Dallas, Texas, although another two ships were scheduled but never completed.
Split into simpler sentences: USS "Dallas" (SSN-700) is a "Los Angeles"-class submarine of the United States Navy. It is one of the latter's two ships to be named for Dallas, Texas, although another two ships were scheduled but never completed.