#include<fstream>
#include<algorithm>
#define x first
#define y second
using namespace std;
ifstream f("hvrays.in"); ofstream g("hvrays.out");
const int Nmax=100005;
pair <int,int> o[Nmax],v[Nmax];
int main()
{   int n,m,i,cover,rez,t;
    f>>t;
    while(t--)
    {   f>>n>>m;
        for(i=1;i<=n;++i) f>>o[i].y>>o[i].x;
        for(i=1;i<=m;++i) f>>v[i].y>>v[i].x;
        sort(o+1,o+n+1);
        sort(v+1,v+m+1);
        cover=-1; rez=0;
        while(n)
        {   if(o[n].y>cover)
            {   ++rez;
                while(m&&v[m].x>=o[n].x)
                {   if(v[m].y>cover) cover=v[m].y;
                    --m;
                }
            }
            n--;
        }
        g<<rez<<"\n";
    }
    g.close(); return 0;
}