result_type operator() (const result_type& str) const {
std::vector<result_type> v;
result_type::const_iterator
first = str.begin(),
last = str.end();
qi::parse(first, last, +(char_-',')%',', v);
return v[8];
}
/// construct begin iterator
locality_result_iterator(result_type const& results)
: data_(new data(results.begin(), results.end()))
{}
