Of the 220 million tons of coal produced in 1997, nearly a half was used for electricity generation, one-eighth was converted to liquid fuels, and nearly one-third was exported.
(the 220 million tons of coal; produced; T:in 1997) (nearly a half; was used; for electricity generation) (one-eighth; was converted; to liquid fuels) (nearly one-third; was exported; )
the 220 million tons of coal nearly a half one-eighth nearly one-third
produced was used was converted was exported
T:in 1997
for electricity generation
to liquid fuels