Which sentence states a fact?
A: Jeff Kinney worked on Diary of a Wimpy Kid for six years before publishing it online.
B: Cartoonist Jeff Kinney's book Diary of a Wimpy Kid deserves all of the praise it has received.
The first sentence states a fact.
Jeff Kinney worked on Diary of a Wimpy Kid for six years before publishing it online.
It can be proved by reading a biography of Jeff Kinney.
The second sentence states an opinion.
Cartoonist Jeff Kinney's book Diary of a Wimpy Kid deserves all of the praise it has received.
Deserves shows what a person believes, thinks, or feels. Another person might have a different opinion about how much praise Diary of a Wimpy Kid deserves.