{:sid => :S1, :name => "Smith", :status => 20, :city => "London"}
{:sid => :S2, :name => "Jones", :status => 10, :city => "Paris"}
{:sid => :S3, :name => "Blake", :status => 30, :city => "Paris"}
{:sid => :S4, :name => "Clark", :status => 20, :city => "London"}
{:sid => :S5, :name => "Adams", :status => 30, :city => "Athens"}