#include <bits/stdc++.h>
using namespace std;

ifstream in ( "hvrays.in"  );
ofstream out( "hvrays.out" );

const int DIM = 1e5 + 5;

pair<int, int> hray[DIM], vray[DIM];

int main( void ) {

    int t;
    in >> t;

    while( t -- ) {
        int n, m;
        in >> n >> m;

        for( int i = 1; i <= n; i ++ )
            in >> hray[i].first >> hray[i].second;
        for( int i = 1; i <= m; i ++ )
            in >> vray[i].first >> vray[i].second;

        sort( hray + 1, hray + n + 1, greater<pair<int, int> >() );
        sort( vray + 1, vray + m + 1, greater<pair<int, int> >() );

        int mxm = -1, ans = 0;
        for( int i = 1, j = 1; i <= n; i ++ ) {
            if( mxm >= hray[i].second )
                continue;

            ans ++;
            while( j <= m && vray[j].first >= hray[i].first )
                mxm = max( mxm, vray[j ++].second );
        }

        out << ans << endl;
    }

    return 0;
}