title: alexa skill does not recognize my correct answer
body: <p>i wrote a simple Q&amp;A Alexa skill which ask the user to guess about the planet name based on its property.</p>
  
  <p>questions are like "Which is the brightest planet in the solar system"</p>
  
  <p>when user respond as  Venus. Alexa says that the answer is incorrect. the correct answer is venus.</p>
  
  <p>I am not sure why cant it recognize. </p>