One kilowatt-hour is the amount of electric energy used to keep one 100-watt light bulb burning for 10 hours.
(One kilowatt-hour; is; the amount of electric energy used to keep one 100-watt light bulb) (one 100-watt light bulb; burning; T:for 10 hours)
One kilowatt-hour one 100-watt light bulb
is burning
the amount of electric energy used to keep one 100-watt light bulb
T:for 10 hours