#define _CRT_SECURE_NO_WARNINGS
#define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING
#include <bits/stdc++.h>
using namespace std;
#define CRP(t, x) const t &x
#define OPL(t, x) bool operator<(CRP(t, x)) const
#define FIL(x, v) memset(x, v, sizeof(x))
#define CLR(x) FIL(x, 0)
#define NE1(x) FIL(x, -1)
#define INF(x) FIL(x, 0x3f)
#ifndef _DEBUG
#define _DEBUG 0
#endif // !_DEBUG
#define IFD if (_DEBUG)
typedef long long ll, i64;
inline void read(int &x)
{
    int ch = x = 0;
    while (!isdigit(ch = getchar()))
        ;
    for (; isdigit(ch); ch = getchar()) x = x * 10 + ch - '0';
}
const int N = 505 * 505, inf = 0x3f3f3f3f;
int adj[N], nxt[N << 1], to[N << 1], cap[N << 1], cur[N], cnt[N], dis2[N], fa[N], ecnt;
inline void addEdge_impl_(int f, int t, int c)
{
    nxt[ecnt] = adj[f];
    adj[f] = ecnt;
    to[ecnt] = t;
    cap[ecnt] = c;
    ecnt++;
}
inline void addEdge(int f, int t, int c)
{
    addEdge_impl_(f, t, c);
    addEdge_impl_(t, f, 0);
}
int ISAP(int S, int T)
{
    int flow = 0;
    for (int i = 0; i < N; i++) dis2[i] = N - 1;
    int len = 0, x;
    static int que[N];
    dis2[que[len++] = T] = 0;
    for (int i = 0; i < len; i++)
        for (int e = adj[x = que[i]]; ~e; e = nxt[e])
            if (cap[e ^ 1] && dis2[to[e]] > dis2[x] + 1)
                dis2[que[len++] = to[e]] = dis2[x] + 1;
    memset(cnt, 0, sizeof(cnt));
    for (int i = 0; i < N; i++) cur[i] = adj[i], cnt[dis2[i]]++;
    x = S;
    while (dis2[S] < N - 1)
    {
        if (x == T)
        {
            int curFlow = inf;
            for (x = T; x != S; x = to[fa[x] ^ 1]) curFlow = min(curFlow, cap[fa[x]]);
            for (x = T; x != S; x = to[fa[x] ^ 1]) cap[fa[x]] -= curFlow, cap[fa[x] ^ 1] += curFlow;
            flow += curFlow, x = S;
        }
        bool needRetreat = true;
        for (int e = cur[x]; needRetreat && ~e; e = nxt[e])
            if (cur[x] = e, cap[e] && dis2[x] == dis2[to[e]] + 1)
                needRetreat = false, fa[x = to[e]] = e;
        if (needRetreat)
        {
            int nd = N - 2;
            for (int e = adj[x]; ~e; e = nxt[e])
                if (cap[e]) nd = min(nd, dis2[to[e]]);
            if (--cnt[dis2[x]] == 0) break;
            ++cnt[dis2[x] = nd + 1];
            cur[x] = adj[x];
            if (x != S) x = to[fa[x] ^ 1];
        }
    }
    return flow;
}
int sm[N];
int main()
{
    int n, m, k;
    read(n), read(m), read(k);
    NE1(adj), ecnt = 0;
    addEdge(0, n + m + 1, k);
    for (int i = 1, cnt; i <= n; i++)
    {
        read(cnt), addEdge(0, i, 1), addEdge(n + m + 1, i, 1);
        for (int j = 0, x; j < cnt; j++)
            read(x), addEdge(i, n + x, 1);
    }
    for (int i = 1; i <= m; i++) addEdge(n + i, n + m + 2, 1);
    printf("%d\n", ISAP(0, n + m + 2));
    return 0;
}