#include<fstream.h>
#define dim 200002

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

unsigned long h,v,cont,aux,max,pmax;
int t;

struct punct
{
unsigned long x;
unsigned long y;
int tip;
};

punct a[dim],man;

void sort()
{
unsigned long i,ok,nn,poz;

ok=0;

nn=aux-1;

do
{ok=0;
 for(i=1;i<=nn;i++)

   if(a[i].x<a[i+1].x)
	    {
	     man=a[i];
	     a[i]=a[i+1];
	     a[i+1]=man;

	     ok=1;

	     poz=i;
	    }

nn=poz;
}
while(ok);



}


int main()
{
unsigned long i;

f>>t;


while(t)
{
f>>h>>v;

aux=h+v;

for(i=1;i<=h;i++)
 {
  f>>a[i].x>>a[i].y;
  a[i].tip=0;
 }

for(i=h+1;i<=aux;i++)
 {
  f>>a[i].x>>a[i].y;
  a[i].tip=1;
 }




sort();

for(i=1;i<=aux;i++)
 {
  if( a[i].tip==1 && a[i].y>pmax )
    pmax=a[i].y;
   else if( !a[i].tip )
       {
	if( a[i].y>max )
	   {
	    max=pmax;
	    cont++;
	   }
       }

 }

g<<cont<<'\n';

t--;
}

f.close();
g.close();

return 0;

}