Is the following sentence factually correct?
"John D. Rockefeller created his own fortune and became wealthiest American of all time."
Options:
- yes
- no
yes
John D. Rockefeller's main business was oil refining, he was in control of 90% of the oil in the United States.

Is the following sentence factually correct?
"Prime Minister of Spain signs the marriage certificate of every legal marriage in Spain."
Options:
- yes
- no
no
This is false because the work of signing marriage certificate is either of a pastor or a magistrate.

Yes / no, is the following a verifiable fact?
"The anciet art of Brazilian jiu-jitsu gives its practitioners superhuman, magical abilities."
no
Brazilian jiu-jitsu is just a martial art, no mysticism or magic involved.

Is the following sentence factually correct?
"The Renaissance occurred roughly fifty years before the Fall of the Roman Empire."
Options:
- yes
- no
no
The Roman Empire collapsed many years prior to the Renaissance.