using System;
using System.Linq;
using System.Linq.Expressions;
using System.Collections.Generic;
using Debug = System.Diagnostics.Debug;
using StringBuilder = System.Text.StringBuilder;
using System.Numerics;
using Number = System.Int64;
namespace Program
{
public class Solver
{
public void Solve()
{
var n = sc.Integer();
var m = sc.Integer();
const int SZ = 320;
var his = new int[SZ + 1][];
var set = new DisjointSet(n);
his[0] = set.par.Clone() as int[];
var a = new int[m];
var b = new int[m];
for (int i = 1; i <= m; i++)
{
a[i - 1] = sc.Integer() - 1;
b[i - 1] = sc.Integer() - 1;
if (set.Unite(a[i - 1], b[i - 1]))
Debug.WriteLine("unite");
else Debug.WriteLine("united");
if (i % SZ == 0)
his[i / SZ] = set.par.Clone() as int[];
else if (i == m)
his[(i / SZ) + 1] = set.par.Clone() as int[];
}
var q = sc.Integer();
for (int i = 0; i < q; i++)
{
var f = sc.Integer() - 1;
var t = sc.Integer() - 1;
var c = sc.Integer();
var p = -1;
for (int j = 0; j < SZ && p == -1; j++)
{
Array.Copy(his[j], set.par, n);
if (set.IsUnited(f, t))
{
if (set.Size(f) >= c) p = j - 1;
}
else
{
if (set.Size(f) + set.Size(t) >= c) p = j - 1;
}
}
Array.Copy(his[p], set.par, n);
for (int j = p * SZ; j < (p + 1) * SZ; j++)
{
set.Unite(a[j], b[j]);
if (set.IsUnited(f, t))
{
if (set.Size(f) >= c)
{
IO.Printer.Out.WriteLine(j + 1);
break;
}
}
else
{
if (set.Size(f) + set.Size(t) >= c)
{
IO.Printer.Out.WriteLine(j + 1);
break;
}
}
}
}
}
public IO.StreamScanner sc = new IO.StreamScanner(Console.OpenStandardInput());
static T[] Enumerate<T>(int n, Func<int, T> f) { var a = new T[n]; for (int i = 0; i < n; ++i) a[i] = f(i); return a; }
static public void Swap<T>(ref T a, ref T b) { var tmp = a; a = b; b = tmp; }
}
}
#region main
static class Ex
{
static public string AsString(this IEnumerable<char> ie) { return new string(System.Linq.Enumerable.ToArray(ie)); }
static public string AsJoinedString<T>(this IEnumerable<T> ie, string st = " ") { return string.Join(st, ie); }
static public void Main()
{
var solver = new Program.Solver();
solver.Solve();
Program.IO.Printer.Out.Flush();
}
}
#endregion
#region Ex
namespace Program.IO
{
using System.IO;
using System.Text;
using System.Globalization;
public class Printer: StreamWriter
{
static Printer() { Out = new Printer(Console.OpenStandardOutput()) { AutoFlush = false }; }
public static Printer Out { get; set; }
public override IFormatProvider FormatProvider { get { return CultureInfo.InvariantCulture; } }
public Printer(System.IO.Stream stream) : base(stream, new UTF8Encoding(false, true)) { }
public Printer(System.IO.Stream stream, Encoding encoding) : base(stream, encoding) { }
public void Write<T>(string format, T[] source) { base.Write(format, source.OfType<object>().ToArray()); }
public void WriteLine<T>(string format, T[] source) { base.WriteLine(format, source.OfType<object>().ToArray()); }
}
public class StreamScanner
{
public StreamScanner(Stream stream) { str = stream; }
public readonly Stream str;
private readonly byte[] buf = new byte[1024];
private int len, ptr;
public bool isEof = false;
public bool IsEndOfStream { get { return isEof; } }
private byte read()
{
if (isEof) return 0;
if (ptr >= len) { ptr = 0; if ((len = str.Read(buf, 0, 1024)) <= 0) { isEof = true; return 0; } }
return buf[ptr++];
}
public char Char() { byte b = 0; do b = read(); while ((b < 33 || 126 < b) && !isEof); return (char)b; }
public string Scan()
{
var sb = new StringBuilder();
for (var b = Char(); b >= 33 && b <= 126; b = (char)read())
sb.Append(b);
return sb.ToString();
}
public string ScanLine()
{
var sb = new StringBuilder();
for (var b = Char(); b != '\n'; b = (char)read())
if (b == 0) break;
else if (b != '\r') sb.Append(b);
return sb.ToString();
}
public long Long()
{
if (isEof) return long.MinValue;
long ret = 0; byte b = 0; var ng = false;
do b = read();
while (b != 0 && b != '-' && (b < '0' || '9' < b));
if (b == 0) return long.MinValue;
if (b == '-') { ng = true; b = read(); }
for (; true; b = read())
{
if (b < '0' || '9' < b)
return ng ? -ret : ret;
else ret = ret * 10 + b - '0';
}
}
public int Integer() { return (isEof) ? int.MinValue : (int)Long(); }
public double Double() { var s = Scan(); return s != "" ? double.Parse(s, CultureInfo.InvariantCulture) : double.NaN; }
private T[] enumerate<T>(int n, Func<T> f)
{
var a = new T[n];
for (int i = 0; i < n; ++i) a[i] = f();
return a;
}
public char[] Char(int n) { return enumerate(n, Char); }
public string[] Scan(int n) { return enumerate(n, Scan); }
public double[] Double(int n) { return enumerate(n, Double); }
public int[] Integer(int n) { return enumerate(n, Integer); }
public long[] Long(int n) { return enumerate(n, Long); }
}
}
#endregion
#region DisjointSet
public class DisjointSet
{
public int[] par;
public DisjointSet(int n)
{
par = new int[n];
for (int i = 0; i < n; i++)
par[i] = -1;
}
public int this[int id] { get { return (par[id] < 0) ? id : par[id] = this[par[id]]; } }
public bool Unite(int x, int y)
{
x = this[x]; y = this[y];
if (x == y) return false;
par[x] += par[y];
par[y] = x;
return true;
}
public int Size(int x) { return -par[this[x]]; }
public bool IsUnited(int x, int y) { return this[x] == this[y]; }
}
#endregion