sentence: Porcupines come in various shades of brown, grey, and the unusual white.
sentences_before: A 'porcupine' is a rodent with a coat of sharp spines, or quills, that defend them from predators. The porcupines include the third biggest rodent, after the capybara, and beaver, and are not to be confused with hedgehogs.
concept_name: porcupine
headings: Porcupine
categories: Rodents