Is the following a factual statement?
"The Three Gorges Dam controls waterflow in China."
Options:
- yes
- no
yes
The Dam is in China and holds water.

"Vomiting occurs when you have digestive track issues."
Is the above claim true?
Options:
- yes
- no
yes
Vomiting is a side effect of issues involving the digestive track.

Does the following sentence make sense?
"Although Othello is a black character, famous white actors have played the part."
Options:
- yes
- no
yes
Sir Lawrence Olivier is said to have given one of the seminal performances as Othello.

Yes / no, is the following a verifiable fact?
"Dementia causes victims to experience memory loss."
yes
My sentence is true because there are many scientific journals that validate that the claim is true.