Since the guns had been in the center during the fire, they became inoperable and in most instances the intense heat melted them into one solid piece.
(the guns; had been; in the center; T:during the fire) (they; became; inoperable) (the intense heat; melted; them; into one solid piece; L:in most instances)
the guns they the intense heat
had been became melted
in the center T:during the fire
inoperable
them into one solid piece L:in most instances