Complex sentence: According to her memoirs, she started seeing spirits and hearing disembodied voices in childhood, abilities she was to develop into mediumship once she joined a local spiritualist church, which she later demonstrated in many television appearances and public readings.
Split into simpler sentences: According to her memoirs, she started seeing spirits and hearing disembodied voices in childhood, abilities she was to develop once she joined a local Spiritualist Church. She began demonstrating mediumship, which she later demonstrated in many television appearances and public readings.