#include <fstream>
#include <vector>
#include <algorithm>

using namespace std;

class InputReader {
    public:
        InputReader() {}
        InputReader(const char *file_name) {
            input_file = fopen(file_name, "r");
            cursor = 0;
            fread(buffer, SIZE, 1, input_file);
        }
        inline InputReader &operator >>(int &n) {
            while(buffer[cursor] < '0' || buffer[cursor] > '9') {
                advance();
            }
            n = 0;
            while('0' <= buffer[cursor] && buffer[cursor] <= '9') {
                n = n * 10 + buffer[cursor] - '0';
                advance();
            }
            return *this;
        }
    private:
        FILE *input_file;
        static const int SIZE = 1 << 17;
        int cursor;
        char buffer[SIZE];
        inline void advance() {
            ++ cursor;
            if(cursor == SIZE) {
                cursor = 0;
                fread(buffer, SIZE, 1, input_file);
            }
        }
};

InputReader cin("hvrays.in");
ofstream cout("hvrays.out");

const int MAXN = 100000;

struct Point {
    int x;
    int y;

    bool operator < (const Point &other) const {
        if (x == other.x)
            return y < other.y;
        return x < other.x;
    }
};

Point horizontal[1 + MAXN], vertical[1 + MAXN];

int main() {
    int tests;
    cin >> tests;
    for (int test = 1; test <= tests; test++) {
        int n, m;
        cin >> n >> m;
        for (int i = 1; i <= n; i++)
            cin >> horizontal[i].x >> horizontal[i].y;
        for (int i = 1; i <= m; i++)
            cin >> vertical[i].x >> vertical[i].y;
        sort(horizontal + 1, horizontal + n + 1);
        sort(vertical + 1, vertical + m + 1);
        int answer = 0, limit = -1;
        int i = n, j = m;
        while (i) {
            if (horizontal[i].y > limit) {
                answer++;
                while (j && vertical[j].x >= horizontal[i].x) {
                    limit = max(limit, vertical[j].y);
                    j--;
                }
            }
            i--;
        }
        cout << answer << "\n";
    }
    return 0;
}