Complex sentence: She drags both of her friends to Gillian Gallagher s (the school's founder) sword and shows them the symbol. Liz says this explains why she couldn't find the symbol for any modern group: "They're old," she says.
Split into simpler sentences: She drags both of her friends to Gilly Gallagher (the founder of the school) 's sword and shows them the symbol. She explains why Liz couldn't find the symbol for any modern group: "They're old," she says.