text: Extract the useful parts from the sentences:
  Examples:
  sentence: "Can you please list the names of 5 animals that start with the letter g?"
  useful: "List five animal names that start with the letter G."
  sentence: "I have a question, how do whales eat if they don't have teeth?"
  useful: "explain how whales eat and why they don't have teeth"
  Real input:
  sentence: "please, list themost popular linux distros" 
  useful: