Complex sentence: This formulation of the insanity requirement is known as the M'Naghten Rules and became the basic test of insanity in England, later being adopted by America and many countries throughout the British Commonwealth.
Split into simpler sentences: This formulation of the insanity requirement is known as the M'Naghten Rules. The M'Naghten rules became the basic test of insanity in England and were adopted by America and many countries throughout the British Commonwealth.