Which sentence states a fact?

 - Abraham Lincoln was one of the greatest American presidents.
 - Abraham Lincoln, the 16th president of the United States, was elected in 1860.
The first sentence states a fact.
Abraham Lincoln, the 16 th president of the United States, was elected in 1860.
It can be proved by looking up the year that Abraham Lincoln was elected president.
The second sentence states an opinion.
Abraham Lincoln was one of the greatest American presidents.
Greatest shows what a person believes, thinks, or feels. Another person might have a different opinion about what makes a president great at his or her job.