#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint998244353;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf 1000000000



int main(){
	
	int _t;
	cin>>_t;
	
	rep(_,_t){
		int N;
		cin>>N;
		vector<int> d(N,0);
		rep(i,N-1){
			int u,v;
			cin>>u>>v;
			u--;v--;
			d[u]++;
			d[v]++;
		}
		
		int l = 0;
		rep(i,N){
			if(d[i]==1)l++;
		}
		
		if(l >= N-l)cout<<"Yes"<<endl;
		else cout<<"No"<<endl;
	}
	
	return 0;
}