The final possible cause is that the weather of 1816 was just a matter of chance--that a series of events occurring at the right place and time could initiate the atmospheric conditions which became the weather of the Summer of 1816.
(events; occurring; L:at the right place and time) (the atmospheric conditions; became; the weather of the Summer of 1816) (The final possible cause; is; that the weather of 1816 was just a matter of chance) Context(The final possible cause is,List([0, 27))):(the weather of 1816; was; just a matter of chance) Context(The final possible cause is,List([0, 27))):(a series of events; could initiate; the atmospheric conditions which became the weather of the Summer of 1816)
The final possible cause is,List([0, 27)) The final possible cause is,List([0, 27))
events the atmospheric conditions The final possible cause the weather of 1816 a series of events
occurring became is was could initiate
L:at the right place and time
the weather of the Summer of 1816
that the weather of 1816 was just a matter of chance
just a matter of chance
the atmospheric conditions which became the weather of the Summer of 1816