What is a difference between alligators and crocodiles?
A difference between alligators and crocodiles is the shape of their heads. Crocodiles have more narrow and longer heads than alligators.
### Instruction: What is a difference between alligators and crocodiles?
### Context: 
### Answer: A difference between alligators and crocodiles is the shape of their heads. Crocodiles have more narrow and longer heads than alligators.</s>