I believe seminary is the word you are looking for. They are trained in a seminary.
The answer would be half, I just did some quick research. Hope this helps :)
The Late Woodland period, which is characterized by a lack of the non-local artifacts and materials (copper, etc.,) that had been seen in the previous 500 years, began around AD 300. Despite the apparent reduction of inter-regional exchange, the Late Woodland period was a time of important cultural changes.
Helio means the sun. so the answer is sun
