#include <bits/stdc++.h>

using namespace std;

using ll = long long;

#define all(x) begin(x), end(x)
#define len(x) int((x).size())

template <class T>
inline bool chmin(T &a, const T &b) {
  if (b < a) {
    a = b;
    return true;
  } else {
    return false;
  }
}

template <class T>
inline bool chmax(T &a, const T &b) {
  if (a < b) {
    a = b;
    return true;
  } else {
    return false;
  }
}

constexpr int Mod = 1e9 + 7;

inline int Red(int x) { return x - (x >= Mod) * Mod; }
inline void Add(int &x, int y) { x = Red(x + y); }
inline int Norm(int x) { return x + (x < 0) * Mod; }
inline void Sub(int &x, int y) { x = Norm(x - y);}

constexpr int N = 30, M = 240, S = (1 << 15) + 10;

int n, m, f[S], g[S][2], pw[M], adj[N], ee[S];

struct Edge {
  int u, v, w;

  bool operator<(Edge x) const { return w < x.w; }
} e[M];

#define popcnt __builtin_popcount
#define lowbit __builtin_ctz

int E(int s) {
  int ans = 0;
  for (int i = 0; i < m; ++i) {
    auto [u, v, _] = e[i];
    ans += (s >> u & 1) == 1 && (s >> v & 1) == 1;
  }
  return 2 * ans;
}

struct DSU {
  int f[N];

  void Init() { iota(all(f), 0); }

  int Find(int x) {
    while (x != f[x]) x = f[x] = f[f[x]];
    return x;
  }

  bool Merge(int x, int y) {
    x = Find(x), y = Find(y);
    if (x == y) {
      return false;
    } else {
      f[x] = y;
      return true;
    }
  }
} dsu;

int GetMul() {
  int mul = 1;
  for (int i = 1; i <= m; ++i) mul = ll(mul) * ((Mod + 1) / 2) % Mod;
  mul = ll(mul) * mul % Mod;
  return mul;
}

void Dp() {
  memset(adj, 0, sizeof adj);
  for (int i = 0; i < m; ++i) {
    auto [u, v, w] = e[i];
    adj[u] += 1 << v, adj[v] += 1 << u;
  }
  memset(f, 0, sizeof f), memset(g, 0, sizeof g);
  g[0][0] = 1;
  pw[0] = 1;
  for (int i = 1; i <= 2 * m; ++i) pw[i] = Red(2 * pw[i - 1]);
  for (int s = 1; s < (1 << n); ++s) {
    int r = lowbit(s), ss = s - (1 << r);
    for (int tt = ss;; --tt &= ss) {
      int t = tt + (1 << r);
      Sub(g[s][1], ll(f[t]) * (g[s - t][0] + g[s - t][1]) % Mod);
      Sub(g[s][0], ll(f[t]) * g[s - t][0] % Mod);
      if (tt == 0) break;
    }
    ee[s] = E(s);
    f[s] = pw[ee[s]];
    for (int t = s; --t &= s;) {
      int r = lowbit(s - t);
      ee[t] = ee[t + (1 << r)] - popcnt(adj[r] & s);
    }
    for (int t = s; t > 0; --t &= s) {
      Add(f[s], ll(g[t][0]) * pw[ee[s - t]] % Mod);
    }
    Sub(g[s][1], f[s]), Sub(g[s][0], f[s]);
    // cerr << "f[" << s << "] = " << f[s] << "\n";
  }
  int ans = 0;
  for (int s = 1; s < (1 << n); ++s)
    Sub(ans, ll(g[s][1]) * pw[ee[(1 << n) - 1 - s]] % Mod);
  cout << ll(ans) * GetMul() % Mod << "\n";
}

void Proc() {
  cin >> n >> m;
  for (int i = 0; i < m; ++i) {
    auto &[u, v, w] = e[i];
    cin >> u >> v >> w, --u, --v;
  }
  sort(e, e + m);
  if (e[m - 1].w == 1) {
    Dp();
    return;
  }
  bool is_b = true;
  for (int i = 0; i < m - 1; ++i) is_b &= e[i].w < e[i + 1].w;
  int mst = 0, new_m = 0;
  dsu.Init();
  for (int i = 0; i < m; ++i) {
    auto [u, v, w] = e[i];
    if (dsu.Merge(u, v)) {
      mst += w;
      if (is_b) e[new_m++] = e[i];
    }
  }
  if (is_b) {
    m = new_m;
    Dp();
    return;
  }
  vector<int> dmst;
  for (int s = 0; s < (1 << m); ++s) {
    if (popcnt(s) != n - 1) continue;
    dsu.Init();
    bool ok = true;
    int sum = 0;
    for (int i = 0; i < m; ++i) {
      if ((s >> i & 1) == 0) continue;
      auto [u, v, w] = e[i];
      sum += w;
      if (!dsu.Merge(u, v)) ok = false;
    }
    if (!ok || sum != mst) continue;
    static vector<pair<int, int>> adj[N];
    for (int i = 0; i < n; ++i) adj[i].clear();
    for (int i = 0; i < m; ++i) {
      auto [u, v, w] = e[i];
      if ((s >> i & 1) == 1)
        adj[u].emplace_back(2 * i, v), adj[v].emplace_back(2 * i + 1, u);
    }
    auto dfs = [&](auto dfs, int u, int p) -> int {
      int s = 0;
      for (auto [id, v] : adj[u]) {
        if (v != p) s += (1 << id) + dfs(dfs, v, u);
      }
      return s;
    };
    for (int i = 0; i < n; ++i) dmst.push_back(dfs(dfs, i, -1));
  }
  int ans = 0;
  for (int s = 0; s < (1 << 2 * m); ++s) {
    for (int t : dmst) {
      if ((s | t) == s) {
        ++ans;
        break;
      }
    }
  }
  cout << ll(ans) * GetMul() % Mod << "\n";
}

int main() {
  freopen("years.in", "r", stdin);
  freopen("years.out", "w", stdout);
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  cin.exceptions(ios::failbit);

  int _, t;
  cin >> _ >> t;
  for (int _ = 1; _ <= t; ++_) Proc();
}