#include<bits/stdc++.h>
#define int long long
using namespace std;
struct edge{
	int to,nxt,w;
}e[2000010];
int T,n,m,nE = 0,timer = 0,tp = 0,rt,oo = 0;
int hd[2000010],dfn[2000010],low[2000010],stk[2000010];
vector<int>ans[2000010];
int id[2000010];
void add(int u,int v,int w){
	e[++nE] = (edge){v,hd[u],w};
	hd[u] = nE;
}
void tarjan(int u){
	dfn[u] = low[u] = ++timer;
	stk[++tp] = u;
	if(u == rt && !hd[u]){
		ans[++oo].push_back(u);
		return;
	}
	for(int i = hd[u]; i; i = e[i].nxt){
		int v = e[i].to;
		if(!dfn[v]){
			tarjan(v);
			low[u] = min(low[u],low[v]);
			if(low[v] >= dfn[u]){
				oo++;
				int z;
				do{
					z = stk[tp--];
					ans[oo].push_back(z);
				}
				while(z != v);
				ans[oo].push_back(u);
			}
		}
		else low[u] = min(low[u],dfn[v]);
	}
}
int col[2000010];
signed main(){
	scanf("%lld",&T);
	int tt = 0;
	while(T--){
		tt++;
		for(int i = 1; i <= oo; i++) ans[i].clear();
		oo = 0;
		nE = 0;
		scanf("%lld %lld",&n,&m);
		for(int i = 1; i <= n; i++) hd[i] = dfn[i] = low[i] = id[i] = col[i] = 0;
		for(int i = 1,u,v,w; i <= m; i++){
			scanf("%lld %lld %lld",&u,&v,&w),add(u,v,w),add(v,u,w);
			if(tt == 490) printf("%lld,%lld,%lld;",u,v,w);
		}
		printf("\n");
		timer = 0;
		for(int i = 1; i <= n; i++) if(!dfn[i]) tp = 0,rt = i,tarjan(i);
		bool flag = 0;
		for(int u = 1; u <= oo; u++){
			int cnt[4];
			cnt[0] = cnt[1] = cnt[2] = cnt[3] = 0;
			for(auto v : ans[u]) id[v] = u,col[v] = -1;
			int cc = 0;
			for(auto v : ans[u]){
				for(int i = hd[v]; i; i = e[i].nxt){
					int vv = e[i].to,w = e[i].w;
					if(id[vv] != u) continue;
					cnt[w]++;
					if(col[v] == -1) col[v] = w;
					else if(col[v] != w) cc++;
					if(col[vv] == -1) col[vv] = w;
					else if(col[vv] != w) cc++;
				}
			}
			if(cc >= 3 && cnt[1] && cnt[2] && cnt[3]) flag = 1;
		}
		puts(flag ? "Yes" : "No");
	}
 	return 0;
}