I was passing coal to the firemen, who shovelled it into the furnaces, where its energy was transformed into steam, which, in the engine-room, was transformed into the electricity with which the electricians worked.
(I; was passing; coal; to the firemen) (the firemen; shovelled; it; into the furnaces) (its energy; was transformed; into steam) (the electricians; worked; )
I the firemen its energy the electricians
was passing shovelled was transformed worked
coal to the firemen
it into the furnaces
into steam