Task: Question Answering
Input (English): Passage: Virginia has the highest concentration of technology workers of any state, and the fourth-highest number of technology workers after California, Texas, and New York. Computer chips became the state's highest-grossing export in 2006, surpassing its traditional top exports of coal and tobacco combined, reaching a total export value of $717 million in 2015. Northern Virginia, once considered the state's dairy capital, now hosts software, communication technology, defense contracting companies, particularly in the Dulles Technology Corridor.
The state has the highest average and peak Internet speeds in the United States, with the third-highest worldwide. Northern Virginia's data centers can carry up to 70% of the nation's Internet traffic, and in 2015 the region was the largest and fastest growing data center market in the nation.Forbes magazine has named Virginia the best state in the nation for business five times, and included it in their top five in 2018, as did CNBC in their America's Top States For Business 2018 rankings, with its deductions being mainly for the high cost of living. Additionally, in 2014 a survey of 12,000 small business owners found Virginia to be one of the most friendly states for small businesses. Virginia has 23 Fortune 500 companies, ranking the state sixth nationwide. Tysons Corner is one of the largest business districts in the nation.
Tourism in Virginia supported an estimated 210,000 jobs and generated $21.2 billion in 2012. Arlington County is the top tourist destination in the state by domestic spending, followed by Fairfax County, Loudoun County, and Virginia Beach. 
Question: What are the top four states with the highest concentration of technology workers?
Output (English): California.