original question: How many electric locomotive classes are built by [General Electric]?
answer: 5
answer type: Electric locomotive class.
auxiliary information: General Electric is an advanced technology, services and financial company taking on the world's toughest challenges.  Dedicated to innovation in energy, health, transportation and infrastructure, GE operates in more than 100 countries and employs about 300,000 people worldwide.
What is the number of electric locomotive classes built by [General Electric]?