#include <iostream>
#include <cstdio>
#include <fstream>
#include <vector>
#include <string.h>
#include <queue>
#define INF 999999999999
using namespace std;
typedef long long lld;

struct Cool
{
    lld vert;
    lld dist;
};

vector<lld> Film[152];
vector<lld> Actor[1002];
vector<lld> ineach[152];

bool star[152][1002];

lld actors, movies, queries;

lld br;
bool TFO[152];

lld BFS_lookfor(lld fromfilm, lld artist)
{
    queue<Cool> Q;
    Cool helper, nw;

    helper.dist = 1;
    helper.vert = fromfilm;
    Q.push(helper);

    TFO[fromfilm] = true;

    while (!Q.empty())
    {
        helper = Q.front();
        Q.pop();
       // cout<<"Sega sme na film "<<helper.vert<<" otdalechen na "<<helper.dist<<endl;

        if (star[helper.vert][artist]) return helper.dist;

        for (lld i=0;i<Film[helper.vert].size();i++)
        {
            if (TFO[Film[helper.vert][i]]) continue;

            TFO[Film[helper.vert][i]] = true;
            nw.dist = helper.dist+1;
            nw.vert = Film[helper.vert][i];
            Q.push(nw);
        }
    }

    return INF;
}

lld MN(lld a,lld b)
{
    if (a < b) return a;
    return b;
}

int main ()
{
    memset(star, 0, sizeof(star[0][0])*152*1002);

    freopen("movie.in","r",stdin);
    freopen("movie.out","w",stdout);

    lld i,j,ii,jj,ind;
    lld v, ans, arg1, arg2;

    scanf("%I64d %I64d",&actors,&movies);

    for (i=1;i<=movies;i++)
    {
        scanf("%I64d",&br);
        for (j=1;j<=br;j++)
        {
            scanf("%I64d",&v);

            Actor[v].push_back(i);
            star[i][v] = true;
            ineach[i].push_back(v);
        }
    }

    for (i=1;i<movies;i++)
    {
        for (j=i+1;j<=movies;j++)
        {
            for (ii=0;ii<ineach[i].size();ii++)
            {
                if (star[j][ineach[i][ii]])
                {
                    Film[i].push_back(j);
                    Film[j].push_back(i);

                    break;
                }
            }
        }
    }

    /*for (i=1;i<=movies;i++)
    {
        printf("Ot film %I64d moje da otidem v %d drugi: ", i, Film[i].size());
        for (j=0;j<Film[i].size();j++)
        {
            printf("%I64d ",Film[i][j]);
        }
        printf("\n");
    }*/

    scanf("%I64d",&queries);
    for (i=1;i<=queries;i++)
    {
        scanf("%I64d %I64d",&arg1,&arg2);

        if (arg1 == arg2)
        {
            printf("0\n");
            continue;
        }


        ans = INF;
        for (j=0;j<Actor[arg1].size();j++)
        {
            memset(TFO, 0, sizeof(TFO));
            ans = MN(ans, BFS_lookfor(Actor[arg1][j], arg2));
        }

        if (ans == INF) ans = -1;

        printf("%I64d\n",ans);
    }
}

/*
10 5
3 1 2 3
3 2 3 4
3 5 6 7
3 1 5 10
2 9 8
5
1 2
8 8
4 7
1 9
2 10
*/