message: Fix sentence in Getting Started for ML Beginners guide.
diff: @@ -91,11 +91,10 @@ a number. Here's the representation scheme:
  A **model** is the relationship between features
  and the label. For the Iris problem, the model defines the relationship
  -between the sepal and petal measurements and the Iris species.
  -Some simple models can be described with a few lines of algebra;
  -more complex machine learning models
  -contain such a large number of interlacing mathematical functions and
  -parameters that they become hard to summarize mathematically.
  +between the sepal and petal measurements and the predicted Iris species. Some
  +simple models can be described with a few lines of algebra, but complex machine
  +learning models have a large number of parameters that are difficult to
  +summarize.
  Could you determine the relationship between the four features and the
  Iris species *without* using machine learning? That is, could you use
  