Context: GE (General Electric) Energy's renewable energy business has expanded greatly, to keep up with growing U.S. and global demand for clean energy. Since entering the renewable energy industry in 2002, GE has invested more than $850 million in renewable energy commercialization. In August 2008 it acquired Kelman Ltd, a Northern Ireland company specializing in advanced monitoring and diagnostics technologies for transformers used in renewable energy generation, and announced an expansion of its business in Northern Ireland in May 2010. In 2009, GE's renewable energy initiatives, which include solar power, wind power and GE Jenbacher gas engines using renewable and non-renewable methane-based gases, employ more than 4,900 people globally and have created more than 10,000 supporting jobs.

Question: In what year did GE enter the renewable energy industry?
Answer: 2002

Question: How much money has GE invested in renewable energy commercialization?
Answer: more than $850 million

Question: In what year did GE acquire Kelman Ltd.?
Answer: 2008

Question: As of 2009, how many people did GE employ in its renewable energy initiatives?
Answer: more than 4,900

Question: When did GE announce an expansion of its business in Northern Ireland?
Answer: May 2010

Question: In what year was Kelman Ltd. formed?
Answer: Unanswerable

Question: How many people did GE employ overall as of 2009?
Answer: Unanswerable

Question: How many people worked for Kelman Ltd. as of 2008 when it was acquired by GE?
Answer: Unanswerable

Question: How much was GE worth as of 2002?
Answer: Unanswerable

Question: How much did GE pay to acquire Kelman Ltd?
Answer: Unanswerable