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

typedef long long ll;
const int N = 1e6 + 10;

int n, m, b[N], maxx;
struct Node {
	int L, R, id;
}a[N];
int Idx, root;
int col[N], dfn[N], low[N], vis[N], cnt;
stack<int> s;
struct Edge {
	int nxt, to;
}edge[N << 3];
int head[N], tot;

inline void add(int x, int y) {
	edge[++tot].to = y;
	edge[tot].nxt = head[x];
	head[x] = tot;
	x ^= 1, y ^= 1;
	swap(x, y);
	edge[++tot].to = y;
	edge[tot].nxt = head[x];
	head[x] = tot;
}
int tr[N << 2];
int lowbit(int x) {return x & (-x);}
void query(int x, int k) {
	while(x) {
		if(tr[x]) add(k << 1 | 1, tr[x]);
		x -= lowbit(x);
	}
}
void update(int x, int i) {
	while (x <= maxx) {
		Idx += 2;
		add(Idx, i << 1);
		if (tr[x]) add(Idx, tr[x]);
		tr[x] = Idx;
		x += lowbit(x);
	}
}
void tarjan(int u) {
	dfn[u] = low[u] = ++cnt;
	vis[u] = 1;
	s.push(u);
	for(int i = head[u]; i; i = edge[i].nxt) {
		int v = edge[i].to;
		if(!dfn[v]) {
			tarjan(v);
			low[u] = min(low[u], low[v]);
		}
		else if(vis[v]) low[u] = min(low[u], dfn[v]);
	}
	if(dfn[u] == low[u]) {
		int v = -1;
		col[0] ++ ;
		while(v != u) {
			v = s.top(); s.pop();
			vis[v] = 0;
			col[v] = col[0];
		}
	}
}
void solve() {
	cin >> n >> m;
	for(int i = 1; i <= n; ++i) {
		cin >> a[i].L >> a[i].R;
		a[i].id = i;
		b[++maxx] = a[i].L;
	}
	sort(a + 1, a + n + 1, [&](Node x, Node y) -> bool {
		return x.L < y.L;
	});
	sort(b + 1, b + maxx + 1);
	maxx = unique(b + 1, b + maxx + 1) - b - 1;
	for (int i = 1; i <= maxx; i++) tr[i] = 0;
	Idx = 2 * n;
	for(int i = 1; i <= n; ++i) {
		a[i].L = lower_bound(b + 1, b + maxx + 1, a[i].L) - b;
		a[i].R = lower_bound(b + 1, b + maxx + 1, a[i].R) - b - 1;
		query(a[i].R, a[i].id);
		update(a[i].L, a[i].id);
	}
	for(int i = 1; i <= m; ++i) {
		int x, y; cin >> x >> y;
		add(x << 1, y << 1 | 1);
	}
	for(int i = 1; i <= Idx; ++ i) if(!dfn[i]) tarjan(i);
	for(int i = 2; i <= Idx; ++i) {
		if(col[i] == col[i ^ 1]) {
			puts("NO");
			return ;
		}
	}
	puts("YES");
	
	for(int i = 0; i <= Idx; ++i) col[i] = low[i] = dfn[i] = head[i] = 0;
	tot = Idx = cnt = 0;
}
int main () {
	ios::sync_with_stdio(false);
	cin.tie(0);
	int T; cin >> T;
	while(T -- ) solve();
	return 0;
}