#include <bits/stdc++.h>
using namespace std;
 
const int MAXN = 100005;
const int MAXM = 100005;
 
vector<int> f[MAXN];
int c[MAXM];
bool e[MAXN];
 
void solve() {
    int n, m;
    if (!(cin >> n >> m)) return;
 
    memset(c, 0, sizeof(int) * (m + 1));
    memset(e, false, sizeof(bool) * n);
 
    for (int i = 0; i < n; ++i) {
        f[i].clear();
        int l;
        cin >> l;
        for (int j = 0; j < l; ++j) {
            int p;
            cin >> p;
            f[i].push_back(p);
            if (p >= 1 && p <= m) {
                c[p]++;
            }
        }
    }
 
    for (int p = 1; p <= m; ++p) {
        if (c[p] == 0) {
            cout << "NO" << "\n";
            return;
        }
    }
 
    for (int i = 0; i < n; ++i) {
        for (int p : f[i]) {
            if (p >= 1 && p <= m && c[p] == 1) {
                e[i] = true;
                break;
            }
        }
    }
 
    int k = 0;
    for (int i = 0; i < n; ++i) {
        if (!e[i]) {
            k++;
        }
    }
 
    if (k >= 2) {
        cout << "YES" << "\n";
    } else {
        cout << "NO" << "\n";
    }
}
 
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
 
    int t;
    if (!(cin >> t)) return 0;
    while (t--) {
        solve();
    }
 
    return 0;
}

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4 10
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2 4 5
1 6
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2 5
4 1 2 3 4
4 1 2 3 4
5 5
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