Given this paragraph about Arlington Virginia, how many elementary schools are there in the county's public education system?

Context: Arlington Public Schools operates the county's public K-12 education system of 22 elementary schools; 6 middle schools; and 3 public high schools. H-B Woodlawn and Arlington Tech are alternative public schools. Arlington County spends about half of its local revenues on education. For the FY2013 budget, 83 percent of funding was from local revenues, and 12 percent from the state. Per pupil expenditures are expected to average $18,700, well above its neighbors, Fairfax County and Montgomery County.

Answer: There are 22 elementary schools in the Arlington public education system.