Complex sentence: The jelling property of the seeds was discovered by the businessman when he drank from a river in Chiayi, and found a clear yellowish jelly in the water he was drinking and was refreshed upon trying it.
Split into simpler sentences: The jelling property of the seeds was discovered by the businessman as he drank from a river in Chiayi. He found a clear yellowish jelly in the water he was drinking and was refreshed upon trying it.