#include <bits/stdc++.h>
using namespace std;
#define int long long 
signed main() {
    int n; cin >> n;
    map<string, int> cnt;
    map<pair<string, string>, int> cnt_;
    for (int i = 1; i <= n; i++) {
        int t; cin >> t;
        string pre, now;
        for (int j = 1; j <= t; j++) {
            cin >> now;
            if (j != 1) {
                cnt_[make_pair(pre, now)]++;
            }
            if (j != t) {
                cnt[now]++;
            }
            pre = now;
        }   
    }
    int q; cin >> q;
    function<int(int, int)> gcd = [&](int a, int b) {
        if (b == 0) return a;
        return gcd(b, a % b);
    };
    for (int i = 1; i <= q; i++) {
        string a, b;
        cin >> a >> b;
        int up = cnt_[make_pair(a, b)];
        int down = cnt[a];
        if (down == 0) {
            cout << "Insufficient data" << '\n';
        }
        else if (up == 0) {
            cout << 0 << '/' << 1 << '\n';
        }
        else {
            int g = gcd(up, down);
            up /= g; down /= g;
            cout << up << '/' << down << '\n';
        }
    }
    return 0;
}