sentences:  Two benches were built against the corners, possibly to disguise the subsidence that occurred as a result of the earlier earthquake.An offering was deposited underneath the central chamber; it consisted of 9 grey obsidian eccentrics, 14 flint eccentrics, a "spondylus" shell, a small fragment of greenstone and carbon remains mixed with unidentified vegetable fibres.The following stage, denominated 2B by archaeologists, also dates to the 8th century and consisted of the unification of Structure 218 with the neighbouring structures 217 and 219, creating a new facade with nine doorways.