Complex sentence: The game was played by men who sat in a circle around a plate-shaped woven basket and placed their carved stones in the basket, along with undecorated discs (sa) cut from the peel of the calabash, the outer shell.
Split into simpler sentences: The game was played by men who sat in a circle around a plate-shaped woven basket and placed their carved stones in the basket. This also involved undecorated discs (sa) cut from the peel of the calabash, the outer shell.