Complex sentence: In 1851, when it was discovered that there were a great many sparrows flying about in the Crystal Palace just before the Great Exhibition was to open, his advice to Queen Victoria was "Sparrowhawks, ma'am".
Split into simpler sentences: In 1851, it was discovered that there were a great many sparrows flying about in the Crystal Palace just before the Great Exhibition was to open. His advice to Queen Victoria was "Sparrowhawks, ma'am".