Complex sentence: As a seasonal symbol in Japan, the dragonfly is associated with autumn, and more generally dragonflies are symbols of courage, strength, and happiness, and they often appear in Japanese art and literature, especially "haiku".
Split into simpler sentences: As a seasonal symbol in Japan, the dragonfly is associated with autumn. More generally, dragonflies are symbols of courage, strength, and happiness, and they often appear in art and literature, especially "haiku".