# -*- coding: utf-8 -*-
"""
http://judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=0144

"""
import sys
from sys import stdin
input = stdin.readline
from enum import Enum


class Graph(object):
    """ single source shortest path """
    class Status(Enum):
        """ ?????????????¨??????¶??? """
        white = 1  # ????¨????
        gray = 2  # ?¨???????
        black = 3  #?¨???????

    def __init__(self, n, data):
        num_of_nodes = n+1
        self.color = [Graph.Status.white] * num_of_nodes  # ????????????????¨??????¶???
        self.M = [[float('inf')] * num_of_nodes for _ in range(num_of_nodes)]
        for i in range(num_of_nodes):
            self.M[i][i] = 0
        self._make_matrix(data)  # data????????????????????£??\??????(?????\?¶???¨???????????????????????§????????????)
        self.d = [float('inf')] * num_of_nodes  # ?§???????????????????(?????????)
        self.p = [-1] * num_of_nodes  # ????????????????????????????¨?????????????????????????

    def _make_matrix(self, data):
        for d in data:
            r = d[0]
            for t in d[2:]:
                self.M[r][t] = 1

    def dijkstra(self, start):
        self.d[start] = 0
        self.p[start] = -1
        while True:
            mincost = float('inf')
            # ??\??????????????§??????????????¨?????????????????????u???????????????
            for i in range(len(self.d)):
                if self.color[i] != Graph.Status.black and self.d[i] < mincost:  # S????±???????????????????S??¨??\?¶?????????????????????????????????????????°???????????????????
                    mincost = self.d[i]
                    u = i  # u??????????????????ID
            if mincost == float('inf'):
                break
            self.color[u] = Graph.Status.black  # ?????????u???S????±???????????????´???
            for v in range(len(self.d)):
                if self.color[v] != Graph.Status.black and self.M[u][v] != float('inf'):
                    # v????????????????????????????????°??????S???????????£???u????????????????????????????????????????????°??????????????±??§??´??°??????
                    if self.d[u] + self.M[u][v] < self.d[v]:
                        self.d[v] = self.d[u] + self.M[u][v]
                        self.p[v] = u
                        self.color[v] = Graph.Status.gray


def main(args):
    n = int(input())
    network = []
    for _ in range(n):
        network.append([int(x) for x in input().split()])

    packets = []
    p = int(input())
    for _ in range(p):
        packets.append([int(x) for x in input().split()])



    memo = [[0]*(n+1) for _ in range(n+1)]
    for i in range(1, n+1):
        g = Graph(n, network)
        g.dijkstra(i)
        for j in range(1, n+1):
            if i == j:
                continue
            if g.d[j] == float('inf'):
                memo[i][j] = float('inf')
            else:
                path = [j]
                u = j
                while g.p[u] != i:
                    path.append(g.p[u])
                    u = g.p[u]
                path.append(i)
                memo[i][j] = len(path)


    for s, d, v in packets:
        if memo[s][d] <= v:
            print(memo[s][d])
        else:
            print('NA')



if __name__ == '__main__':
    main(sys.argv[1:])

Measured memory_bytes: 8608