Go: package main

import (
	"bufio"
	"os"
	"strconv"
	"strings"
	"log"
	"fmt"
)

var scanner = bufio.NewScanner(os.Stdin)

const INF = 0x7FFFFFFF

func main() {
	for scanner.Scan() {
		n, _ := strconv.Atoi(scanner.Text())
		if n == 0 {
			break
		}
		having := map[string]Entry{}
		for i := 0; i < n; i++ {
			scanner.Scan()
			buf := strings.Split(scanner.Text(), " ")
			name := buf[0]
			price, _ := strconv.Atoi(buf[1])
			having[name] = Entry{price, []string{}}
		}
		scanner.Scan()
		m, _ := strconv.Atoi(scanner.Text())
		for i := 0; i < m; i++ {
			scanner.Scan()
			buf_ := strings.Split(scanner.Text(), " ")
			name_, price_ := buf_[0], INF
			if _, ok := having[name_]; ok {
				price_ = having[name_].price
			}
			having[name_] = Entry{price_, buf_[2:]}
		}
		scanner.Scan()
		fmt.Println(calculation(scanner.Text(), having))
		log.Printf("%+v\n", having)
	}
}

type Entry struct {
	price int
	elements []string
}

// メモ再帰的
func calculation(target string, having map[string]Entry) int {
	ans := INF
	if len(having[target].elements) > 0 {
		ans = 0
		for _, item := range having[target].elements {
			ans += calculation(item, having)
		}
	}
	return min(ans, having[target].price)
}

func min(a, b int) int {
	if a < b {
		return a
	}
	return b
}

C++: #include<iostream>
#include<vector>
#include<string>
#include <map>
using namespace std;
pair<string, int>p[101];
pair<string, vector<string>>chan[101];
int search(string);	
int n;
int m,si;
int main()
{
	
	while (true){
		cin >> n;
		if (n == 0){
			break;
		}
		for (int i = 0; i < n; i++){
			cin >> p[i].first >> p[i].second;
		}

		cin >> m;
		for (int i = 0; i < m; i++){
			cin >> chan[i].first >> si;
			for (int i2 = 0; i2 < si; i2++){
				string s;
				cin >> s;
				chan[i].second.push_back(s);
			}
		}
		string s;
		cin >> s;
		int ans = search(s);
		cout << ans << endl;
	}
}
int search(string s){
	int num = 0;
	bool flag = true;
	for (int i = 0; i < m; i++){
		if (chan[i].first == s){
			flag = false;
			for (int i2 = 0; i2 < chan[i].second.size(); i2++){
				num += search(chan[i].second[i2]);
			}
		}
	}
	if (flag){
		for (int i = 0; i < n; i++){
			if (p[i].first == s){
				num += p[i].second;
			}
		}
	}
	return num;
}

C++: #include <iostream>
#include <cstdio>
#include <cstdlib>
#include <time.h>
#include <math.h>
#include <vector>
#include <queue>
#include <map>
#include <set>
#include <algorithm>
#include <iterator>
#include <sstream>
#include <string>
#include <bitset>
using namespace std;
#define rep(I,N) for(int I = 0; I < (int)(N); I++)
#define FIN(V) cout<<V<<endl
#define pb push_back
#define INF (1 << 30)
typedef pair<int, int> P;
typedef long long ll;
typedef priority_queue<int> pq;
int StrToInt(string);
string IntToStr(int);
int solve(map<string, int> list, map<string, vector<string> > lesp, string make){
	vector<string> item = lesp[make];
	ll mini = INF;
	ll cost = 0;
	rep(i, item.size()){
		if(!lesp[item[i]].empty()){
			//cout << "item" << endl;
			cost += min(list[item[i]], solve(list, lesp, item[i]) );
		}else{
			cost += list[item[i]];
		}
	}
	mini = min(mini, cost);
	return mini;
}

int main(void){
	int n, m;
	while(cin >> n, n){
		map<string, int> LIST;
		string MAKE;
		rep(i, n){
			string s;
			ll cost;
			cin >> s >> cost;
			LIST[s] = cost;
		}
		cin >> m;
		map<string, vector<string> > LESP;
		rep(i, m){
			string s;
			cin >> s;
			int num;
			cin >> num;
			vector<string> v;
			rep(j, num){
				string L;
				cin >> L;
				v.push_back(L);
			}
			LESP[s] = v;
		}
		cin >> MAKE;
		if(m == 0){
			cout << LIST[MAKE] << endl;
			continue;
		}
		ll ans = solve(LIST, LESP, MAKE);
		FIN(ans);

	}


	return 0;
}



int StrToInt(string s){
	stringstream ss;
	ss << s;
	int val;
	ss >> val;
	return val;
}
string IntToStr(int i){
	stringstream ss;
	ss << i;
	return ss.str();
}

C++: #include<iostream>
#include<string>
#include<algorithm>

using namespace std;

int main()
{
	string items[101];
	int p[101];
	int n,m,i,j,k,l;
	
	for(;;)
	{
		cin >> n ;
		if(n==0)
			break;
		for(i=0;i<n;i++)
		{
			cin >> items[i] >> p[i] ;
		}
		
		cin >> m ;
		for(i=0;i<m;i++)
		{
			int s_p=0;
			string item,s_item;
			int nm;
			cin >> item >> nm ;
			for(k=0;k<n;k++)
			{
				if(items[k]==item)
					break;
			}
			for(j=0;j<nm;j++)
			{
				cin >> s_item;
				for(l=0;l<n;l++)
				{
					if(s_item==items[l])
					{
						s_p+=p[l];
						break;
					}
				}
			}
			p[k]=min(p[k],s_p);
		}
		string last;
		cin >> last;
		for(i=0;i<n;i++)
		{
			if(items[i]==last)
			{
				cout << p[i] << endl;
				break;
			}
		}
	}
}

C++: /* template.cpp(shinobu_menkoi) {{{ */
#include <bits/stdc++.h>
using namespace std;

// clang-format off
#define GET_MACRO(_1, _2, _3, _4, NAME, ...) NAME
#define rep(...) GET_MACRO(__VA_ARGS__, rep4, rep3, rep2, rep1)(__VA_ARGS__)
#define rep1(n) rep2(_, n)
#define rep2(i, n) rep3(i, 0, n)
#define rep3(i, a, n) rep4(i, a, n, 1)
#define rep4(i, a, n, s) for (lint i = (a); i < (lint)(n); i += (s))
#define rrep(...) GET_MACRO(__VA_ARGS__, rrep4, rrep3, rrep2, rrep1)(__VA_ARGS__)
#define rrep1(a) rrep2(_, a)
#define rrep2(i, a) rrep3(i, a, 0)
#define rrep3(i, a, n) rrep4(i, a, n, 1)
#define rrep4(i, a, n, s) for (lint i = (a); i >= (lint)(n); i -= (s))
#define each(i, ctn) for (auto &&i : (ctn))

#define pb push_back
#define eb emplace_back
#define mp make_pair
#define fi first
#define se second
#define all(v) begin(v), end(v)
#define debug(x) cerr << (x) << " (L:" << __LINE__ << ")" << '\n'
#define TEMP_T template <class T>
#define TEMP_TU template <class T, class U>

TEMP_T using vec = vector<T>;
TEMP_T using heap = priority_queue<T>;
TEMP_T using minheap = priority_queue<T, vec<T>, greater<T>>;
using lint = long long;
using ulint = unsigned long long;
using ld = long double;
using vi = vec<int>;
using vvi = vec<vi>;
using vvvi = vec<vvi>;
using pii = pair<int, int>;
using vs = vec<string>;

TEMP_TU ostream &operator<<(ostream &os, const pair<T, U> &p) { return os << p.fi << " " << p.se; }
TEMP_TU istream &operator>>(istream &is, pair<T, U> &p) { return is >> p.fi >> p.se; }

const int INF{1001001001};
const lint LINF{1001001001001001001ll};
const int MOD{(int)1e9 + 7};
const double EPS{1e-9};
const double PI{acos(-1)};
const int dx[]{0, 1, 0, -1, 1, -1, 1, -1}, dy[]{1, 0, -1, 0, 1, -1, -1, 1};

inline bool inside(int y, int x, int h, int w) { return y >= 0 && x >= 0 && y < h && x < w; }
TEMP_T inline bool chmin(T &a, const T &b) { if (a > b) a = b; return a > b; }
TEMP_T inline bool chmax(T &a, const T &b) { if (a < b) a = b; return a < b; }
TEMP_T inline void print(const T &x) { cout << x << '\n'; }
TEMP_T inline void print(const vec<T> &v, string d = "\n") { rep(i, v.size()) cout << v[i] << (i == (lint)v.size() - 1 ? "\n" : d); }
template <class T = int> inline T in() { T x; cin >> x; return x; }
template <class T = string> vec<T> split(const string &s, char d = ',') {
  vec<T> v; stringstream ss(s); for (string b; getline(ss, b, d); ) {
    stringstream conv(b); T t; conv >> t; v.eb(t); } return v;
}
struct pre_ { pre_() { cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(12); } } pre__;
// clang-format on
/* }}} */

signed main() {
  int n;
  while (cin >> n, n) {
    unordered_map<string, int> chie;
    rep(i, n) {
      string s;
      int p;
      cin >> s >> p;
      chie[s] = p;
    }
    int m;
    cin >> m;
    rep(i, m) {
      string s;
      int k;
      cin >> s >> k;
      int res = 0;
      rep(j, k) {
        string t;
        cin >> t;
        res += chie[t];
      }
      chmin(chie[s], res);
    }
    print(chie[in<string>()]);
  }
}