If a dam is held empty it has the greatest capacity for control of severe floods

Can you repeat this sentence, but add in punctuation?
If a dam is held empty it has the greatest capacity for control of severe floods.
Mr Gorbatchev President of the Soviet Union resigns

Can you repeat this sentence, but add in punctuation?
Mr Gorbatchev, President of the Soviet Union, resigns.
Glass Door Lock easily installs

Can you repeat this sentence, but add in punctuation?
Glass Door Lock easily installs.