#include <cstdio>
#include <algorithm>

using namespace std;

#define file_in "hvrays.in"
#define file_out "hvrays.out"

#define Nmax 101000
#define mp make_pair


pair<int,int> H[Nmax],V[Nmax];
int T,h,v;
int nrr,ymax;

int main()
{
	int i,j,x,y;
	char s[20];
	freopen(file_in,"r",stdin);
	freopen(file_out,"w",stdout);
	
	scanf("%d", &T);
	
	while(T--)
	{
		scanf("%d %d", &h,&v);
		
		for (i=1;i<=h;++i) 
		{
			gets(s);   
            for(x=j=0;s[j]!=' ';++j)   
            x=x*10+s[j]-'0';   
            for(y=0,++j;s[j];++j)   
            y=y*10+s[j]-'0';   
			H[i]=mp(x,y);
		}
		for (i=1;i<=v;++i)
        {
			gets(s);   
            for(x=j=0;s[j]!=' ';++j)   
            x=x*10+s[j]-'0';   
            for(y=0,++j;s[j];++j)   
            y=y*10+s[j]-'0';  
			V[i]=mp(x,y);
		}
		
		sort(H+1,H+h+1);
		sort(V+1,V+v+1);
		
		ymax=-1;
		nrr=0;
		for (i=1;i<=h;++i)
		{
			if (H[i].first>ymax)
			{
				nrr++;
				for (j=1;j<=v && H[i].second<=V[j].second;++j)
					 ymax=max(ymax,V[j].first);
			}
		}
		
		printf("%d\n", nrr);
	}
	
	fclose(stdin);
	fclose(stdout);
	
	return 0;
}