Does the following sentence make sense?
"The Mongols were not very successful under their most famous leader."
Options:
- yes
- no
no
The greatest territorial gains of the Mongols came under the leadership of their most famous leader.

Yes / no, is the following a verifiable fact?
"To get to the Paris Opera people can take the metro."
yes
Visitors to the Paris Opera can take the metro as a means of transportation.

Is the following a factual statement?
"Hits by ABBA include Take On Me and The Sun Always Shines on T.V."
Options:
- yes
- no
no
These songs were performed by A-ha, not ABBA.

Is the following a factual statement?
"People listen to music composed by George Sand."
Options:
- yes
- no
yes
George Sand was a composer and composed much music still listened to today.