Yes / no, is the following a verifiable fact?
"The Drain fly drinks blood and is a part of the Psychodidae insect family."

Let me think out loud. You can look up online or any information center and find it to be true. The answer is yes.

Is the following sentence factually correct?
"St. Moritz goes above the sea level of 5,910 ft."
Options:
- yes
- no

Let me think out loud. The place goes above that high from the sea. The answer is yes.

Does the following sentence make sense?
"Prague Spring attempted to grant additional rights to the citizens of Czechoslovakia in an act of partial decentralization."
Options:
- yes
- no
Let me think out loud. The sentence is true because historians have researched the matter and have demonstrated through reasonable evidence that the above claim is true. Also, people who experienced it have left testimonies. The answer is yes.