Как по поисковому запросу классифицировать элемент в каталоге?

#include <vector>
#include <string>
#include <iostream>
#include <algorithm>
#include <iterator>
using namespace std;

int main()
{
	vector<string> Data = { "Audi", "A8", "4.2", "quattro", "2008" };
	vector<string> Query = { "2008", "BlaBlaBla", "A8"};
	vector<string> Intersection(Data.size() + Query.size());
	vector<string>::iterator it;
	sort(Data.begin(), Data.end());
	sort(Query.begin(), Query.end());
	it = set_intersection(Data.begin(), Data.end(),
		                        Query.begin(), Query.end(),
		                        Intersection.begin());

	Intersection.resize(it - Intersection.begin());
	cout << Intersection.size()<<endl;
	for (string s: Intersection)
	{
		cout << ' ' << s;
	}
	getchar();
	return 0;
}

2
2008 A8