Complex sentence: A witch named Modesty Rabnott took pity on the Snidget and rescued it with a Summoning Charm, by the time she was caught she had released the Snidget she was fined 10 Galleons, meaning she lost her house.
Split into simpler sentences: A witch named Modesty Rabnott took pity on the Snidget and rescued it with a Summoning Charm, and had released it by the time she was caught. She was fined 10 Galleons, meaning she lost her house.