Complex sentence: Moiraine, however, had an agenda: she had discovered that Egwene had the spark and could learn to channel; it was Moiraine's intent to bring her to Tar Valon to train; when Nynaeve chased after them, Moiraine decided to include her as well.
Split into simpler sentences: Moiraine, however, had an agenda: she had discovered that Egwene had the spark and could learn to channel. When Nynaeve chased after them, Moiraine decided to include her as well.