Taken from the Barron's SAT prep book:
What may be the world's largest rodent is the capybara, a water loving mammal found throughout much of South America.
According to the answers this is a grammatically correct sentence, though it just looks and sounds very wrong to me, and I'm pretty sure I've never seen anything resembling this structure before.
My question is what are the benefits (if there are any) of such a sentence to this one:
The world's largest rodent may be the capybara, a water loving mammal found throughout much of South America.