conversations.from: human
conversations.value: Find the answer to the math problem: Martha has 11 butterflies in her collection. She has twice as many blue butterflies as yellow butterflies. The rest of her butterflies are black. If Martha has 5 black butterflies, how many blue butterflies does she have?
conversations.from: assistant
conversations.value: Martha has 11-5=6 blue and yellow butterflies.
  Martha has 6/3=2 yellow butterflies.
  Martha has 2*2=4 blue butterflies.